Ординатура / Офтальмология / Английские материалы / Essentials of Ophthalmic Lens Finishing, 2nd edition_Brooks_2003

Clamping system, 263f Clapper plate, position, 316

Cleaning products, disposal, 340 Clipped screw, rough ends, 257f Clips

appearance, 271f cleaning, 264 lengths, 271f parallelism, 270f

spring-tension effect, 267f usage, 263

width, adjustment, 270f Closure pliers. See Eyewires

usage. See Lens size Coating, 6 Colmascope

crossed polarizing filter, 305f definition, 167, 200

usage, 168f, 305 Color. See Solid tint

accuracy

checking, 217-218 ensuring, 217-220

balance, 218 balancing

recommendations. See Dyes table, 220t

cross-contamination, prevention, 217 matching, 218-219

forced matching, 219 usage. See Tints

Color coding lens holders, 217f Color Primer, 216

Columbia Resin 39 (CR-39) (Pittsburgh Plate Glass Co.)

1.498 index, 227 lenses, 3f plastic, 249

plastic lenses, 169, 226 AR coating, 228

light, transmittance, 227 trademark, 169

uncoated lenses, comparison, 295

Company policy. See Hazardous communication program

Computer lenses. See Specialty computer lenses Computer-assisted drills, 249, 265-266

advantages/disadvantages, 271f Computer-assisted patternless edgers, 315 Concentration. See Diamond wheels

factor, 321f Cone tool

absence, 255

usage. See Abrasive cone tool; Holes; Notches

Cone-shaped tool, 264, 269f Construction factors. See Diamond wheels Containers, labels, 333

Contractor employers, 346 Convergence, definition, 76 Conversations, documentation, 337 Coolants. See Edgers

change, 309, 317 concentration, variation, 317

disposal. See Edgers; Hand edgers flow, 176

maintenance, 168 presence, 164

pump, disconnection, 323

Coquille, usage, 204. See also Shape tracing; Three-piece mountings

Cornea, limitation, 45f Correctional modifications, 205-206 Corridor

length, 98

width. See Progressive corridor CR-39. See Columbia Resin 39 Crackle-finish exteriors, 311 Crank handle, usage, 266f

Crazing. See Antireflection coating; Crown glass definition, 226

Crib lenses, 3f

Cross-contamination, prevention. See Color Crossed polaroids, usage, 167 Crossed-line-target lensmeter, usage. See Single

vision sphere spotting; Spherocylinder lenses

Crossing point. See Cylinder lines; Sphere lines Crown glass, 168

lenses

crazing, 304f

impact resistance, 305 C-size, definition, 56

CSS. See Centration skills series Curing. See Lens-curing factor

definition, 215

Curved cutting shears, usage, 55f

Curved upper segment border, lateral corners, 126f Curved-rim frame, 179

Curved-top segment, 126f

Curve-top bifocals. See Centration skills series Curve-top lenses, 439f

centration process, 406 Curve-top segments, 406

centration, 125-126 Cushion coatings, benefit, 296 Cutters, 151f, 320

blades, 326

usage, 166f, 278f

Cutters (Continued)

matching, questions, 327-328 proficiency test questions, 326-328 wheels, 278

Cutting, 101f. See also Patterned edging center, 49

nib, 277 plane, 193f

pliers, usage, 257f

speed factors. See Hand edging spoon, 150f, 151f

holding, position, 150f wheels, 150f

cleanliness/coolness. See Groover usage. See Recessed metal rim

Cylinder axis, 25f, 30f, 34f. See also 121-degree cylinder axis; Prescribed cylinder axis; Required cylinder axis

errors, 313f, 314f incorrectness, 63f position, approach, 91 tolerance, 30

Cylinder component, 30f Cylinder lenses, 28f

decentration. See Plano cylinder lenses Cylinder lines, 15f

crossing point, 22f definition, 12 focusing, 15f positioning, 20f

Cylinder power, 5f increase, 91 variation, 98f Cylinder values, 15f

D

Dab-on applicator, usage, 139 Datum line, definition, 41 Daylight-type bulbs, usage, 218 DBC. See Distance between centers DBL. See Distance between lenses Deblocker, mounting. See Layout

Deblocking, 3f, 6, 185. See also Adhesive pad; Adhesive pad-blocked lenses; Alloy-blocked lens; Metal alloy-blocked lenses; Suction-blocked lenses; Wax-blocked lenses

definition, 6

laboratory towel, usage, 187f methods, 188b

occurrence, 186f

proficiency test questions, 188-189 reblocking, combination, 187f

Decals, usage, 35f, 104f

Decenter (finding), pattern makers (usage), 62

Decentered pattern option, 62 usage, 63f

Decentering, 50, 64f, 87f. See also Minus lens Decentration, 20f, 50, 51f. See also Left decentration;

Plano cylinder lenses; Reading glasses; Right decentration; Total decentration; Vertical segment decentration

amount, 88f, 311. See also Optical center addition, 89f

calculation, 181

boxing system, usage. See Horizontal decentration

correction, 85f

determination, monocular interpupillary distances (usage), 76

direction, 79b, 80f inset, comparison, 115f occurrence, 51f requirement, 63f

Decentration per lens, 76 binocular distance PD, usage, 52

Dehardening process, 202 Deionized water, usage, 213 Demarcation line, visibility, 2, 166f Demo lenses, 158

tracing, 66f

Dental pick, usage, 286f

Depressed-segment one-piece multifocals, testing exemption, 294

Diameter. See Effective diameter lens circle, 90f

Diamond wheels advantages, 191f concentration, 321 dressing, 322-326

sticks, 323f

hand edgers, 190-192 layer, depth, 321

surfaces, construction factors, 320-322 truing, 325

usage, 164 Diamonds

amount, reduction, 191f burr

absence, 255 usage, 254

clogging, 161 concentrations, 321t cutting surfaces, 325 particles, 320

exposure, 323f spacing, 162f

powder, 321

Diamond-wheel edgers, capability, 278f Difference measures, 115f

Direct plus cylinder power readings, 16 Displacement compensation. See Patterns Distance between centers (DBC)

definition, 43, 51 determination, 51-52, 76

A dimension, relationship, 44f

Distance between lenses (DBL), 42-43, 63f, 76. See also Frames

measurement, 43f, 54. See also Grooved frame Distance decentration, 105, 121, 129f. See also Left

lens calculation, 418 correction, 123f usage, 123, 126

Distance OC location, 31f

vertical placement, 32f Distance PD, 62f, 116

alteration, 122b amount, 118 favoring, 121-124 maintenance, 122b

near PD, relationship, 121-122

Distance portion, MRP (checking). See Flat-top multifocals

Distance power amount, 100f

checking. See Major reference point completion, 5f

verification. See Progressive addition lenses location, 99f

Distance prescription, 109f

Distance reference point (DRP), 98, 99f definition, 32, 98

location, 33f, 104f Distances, variations, 44f Distilled water

addition. See Dyes usage, 213

Documentation. See Accidents; Conversations; Injuries; Training

maintenance, 336-337

Dots. See 180-degree reference dots; Center dot; Lensmeter dots

circle, usage, 15f losing, 85f

placement. See 180-degree line; Aligned dots; Spherocylinder lenses

position, 129

raising/lowering. See Central lensmeter dot reference usage, 105f

Dotted hidden circles, 105

Dotted lines appearance, 203f usage, 10f, 101f

Dotted MRP, usage, 131

Dotted segment border, usage. See Blended bifocals Dotting. See Lenses

Double D lenses, 440f Double gradients, 221f, 224 Double straps, distance, 273f Double-bevel appearance, 205 Double-hole mountings, 260

Double-padded nylon jaw pliers, usage, 245 Double-segment lenses, 131-132

centration, 132-133

vertical lens area, sufficiency, 133f Double-sided adhesive blocking pad, 82, 117 Double-sided adhesive pad, 140 Double-sided adhesive tape, usage, 260

Double-sided tape, usage, 140f. See also Drilling Double-strap area, adjustments, 268-269 Double-strap mountings, usage, 266-273

Dress eyewear, requirements, 292-296

Dress ophthalmic lenses, minimum thickness, 293 Dressing. See Diamond wheels

sticks. See Diamond wheels; Finishing wheels; Roughing wheels

process, 323f Drilled hole

chamfering, 255f

smoothing, rat-tail file (usage), 256 Drilled lens, attachment. See Mountings Drilled mountings, 247

bibliography, 273

proficiency test questions, 274-275 Drill-guide, inclusion, 251

Drilling. See Free hand drilling; Lens drilling; Nasal hole; Polycarbonate lenses; Temporal hole

bit, pressing, 269f

chart, usage, 251f, 262, 267f effect. See Impact resistance guides. See Frames

double-sided tape, usage, 261f usage, 262f

sequence, template, 261f setup. See Nasal side system, 263f

Drill-mounting, quality, 265 Drillrite Automatic Lens Drill, 262

Drills. See Computer-assisted drills; In-edger drill bit

lens, pressing, 266f pressing, 254f

historical note. See Hand drills improvements. See Electric drills

Drills (Continued) movement, ability, 262

small-millimeter gauge, inclusion, 253f stand, table construction, 263

types. See Lenses usage. See Lens drilling

Driving, specialty lens (usage), 109f Drop. See Segment drop

Drop ball test, 293-294 timing, 294

Drop-ball tester, usage, 294f Drop-ball testing. See Glass lenses DRP. See Distance reference point Drum tool, usage. See Polishing Dry cut edgers, 164-167, 326

emergency stops, 167 problems, 338-339

size accuracy, checking, 167

Dry edging. See Polycarbonate lenses Dry-cut router-blade-type edger, usage, 277 Dummy lenses, 252-253

usage, 204

Duty to Inform program, 296-297

Dyeing. See Antireflection-coated lenses; Hard-coated lenses; High-index lenses; Nylon cords; Plastic polarizing lenses; Simple gradient lens; Ultraviolet dyeing

process

lens coating, effects, 226-228 lens material, effects, 226-228

Dyes, 213-215

contamination, prevention, 214f disposal, 340

distilled water, addition, 215f distribution. See Polycarbonate lenses life span, 215

maintenance, 214-215

manufacturer, color balancing recommendations, 220t

preparation, 213-214

smells, laboratory reduction, 229

E

ED. See Effective diameter

Edge polishing, 206-208. See also Antireflection-coated lenses; Glass lenses; High-index plastic; Plastic lenses; Polycarbonate lenses

edger, usage, 207

Edge smoothing, 192-194. See also Front bevel continuation, 199

lens, proper holding, 193-194 practicing, 197

process, 193f, 199

wheel, preparation, 192-193

Edge thickness. See Grooving; Rimless lenses dependence, 271f

determining, 3f errors. See Plus lenses increase, 9

lens, feeling, 172-175 minimum, 285

rolled edge, effect, 166f variation, 279f

Edged gradient lenses, 223 Edged lenses, 31f

back-to-back holding, 313f boxing center, 51f, 81, 85f front-to-front, holding, 30f geometrical center, 85f line, drawing, 252f

nasal half, 51f

scratches, appearance, 28f thickness, measurement, 175f

Edger dials

configuration, zero/plus-minus scale, 154-155 marking, 154-155

relationship. See Eyesize scales, combination, 155

Edger settings, accuracy adjustment

circumference, usage, 316 A dimension, usage, 316 increasing, 155-157

Edger wheels, 320

matching, questions, 327-328 proficiency test questions, 326-328 usage. See Apex placement

Edgers. See Dry cut edgers; WECO edger axis checking sequence, 313b calibration, 313-316

chuck pressure, reduction, 170 cleaning, 316-317

coolants, 318 disposal, 340

cutting technique, 152 frame tracer

combination, 173f usage, 67

frosted appearance, 197 guided bevel system, usage, 171 lens placement, 152f lubrication, 316-317 manufacturer design, 139f pattern, placement, 62, 65f setting, 154f

size, setting, 152-153 sizing dial, 153 stand-alone capabilities, 67

Edgers (Continued) tracers, placement, 69f types. See Hand edgers

usage. See Dry-cut router-blade-type edger; Edge polishing; Grooving; Pattern making

Edges. See Thin edges bevel, occupation, 160f beveling, 255f chamfering, 255f

configuration, destruction (avoidance), 192f gauge, 261

groove, positioning, 279-284

grooving. See Back edge; Front edge; Middle edge; Nylon cords

locations, appearance. See High-plus lenses marking, 261f

minimization. See Minus edges moderate thickness, 269-272 padding, 187f

temporal side appearance, 178f usage. See Polished edge; Rolled edges viewing screens, usage, 177-178

Edging, 3f, 6, 149, 159f. See also Blocked lenses; Glass lenses; Hand edging; Lenses; Patterned edging; Patternless edging; Plastic lenses; Pre-edging; Wrap-around frames

blocking, usage, 83f center, 49

ceramic wheels, usage. See Automatic edging circumference chart, 158t

completion, 154f, 175f cycle, 315 dimensions, 179f

errors, catching. See Flat-top multifocals laboratory, 2

personnel, checking, 296

lenses, usage. See Wrap-around frames overall process, 161-167

patternless systems, frame tracer (usage), 62-70 process, 322f. See also Patterned edging

layout, 415 pliers, usage, 240f

proficiency test questions, 182-184 selection. See Polycarbonate lenses size

accuracy (increasing), circumference gauge/chart (usage), 157-159

compensation, usage. See Frames special situations, 170-171

starting point, 195f

stress. See Polycarbonate lenses variations. See Lenses

Effective diameter (ED), 41-42. See also Frames angle, 42

Effective diameter (ED) (Continued) blank size, addition, 89f

circles, usage. See Centration definition, 41

determination. See Lens shapes measurement, 41f, 42f showing, 83

usage, 86f

Electric chucking, 159

Electric drills, improvements, 260-263 Electric stand drills, usage. See Lens drilling Electrical hazards, 331

awareness, 337-338 Electrometallic wheels, 322

Electronically controlled method, 162 Electroplated roughing wheels, 161 Electroplated wheels, cleaning, 325 Elongation, direction, 15f

Emergency Action Plan, usage. See Businesses Emergency lights, example, 339f

Emergency telephone numbers, display, 336 Employee

involvement. See Safety program participation, 331 responsibilities, 344

training, 333-334

Employee Right To Know laws, 330 Employee-identified problems, correction, 335 Employers. See Contractor employers

responsibility, OSHA impact, 330-331 Enclosing box, center, 41f

Endpiece

bending, 242-243 gripping, 244f holding, 245f size, 245f

Engineering out the hazard. See Hazards Engraved circles, location/dotting, 34f Engraving, 3f, 6

Environmental concerns, 329, 339-341 information, 341

proficiency test questions, 342-343 recommendations, 340-341

Environmental Protection Agency (EPA), 329, 330 EPA. See Environmental Protection Agency Errors. See Human error; Optical center; Parallax;

Pattern errors amount, 205

parallax, effect, 34

compensation. See Horizontal OC error; Major reference point

sources, 314f. See also Axis Essilor. See Interview; Varilux Etchings, marking, 34

Executive bifocal, ledge, 171f Executive lenses, 171, 201, 250, 439f

positioning, 283 rotation, 284

testing, exemption, 294 Exit signs, display, 335 Explosion hazards, 331 Exposure limits, 333

Eyeglass correction. See Spherical eyeglass correction Eyepiece

focusing. See Lensmeter location, 12

Eyes

decentration, 204 suppression, 90 tracing, 64

Eyesize, 44f. See also Frames

adjustments. See Manual patterned edgers change, effect. See Lens shapes definition, 40

edger dial marking, relationship, 154 measurement, boxing system usage, 156f setting, 316

Eyesize/pattern size ratio, 54

Eyewear. See Safety eyewear; Sports eyewear categories, 292

requirements. See Dress eyewear Eyewires

closure pliers, 239f usage, 240f

conformance. See Bevel forming pliers, 239f groove, 90f

horizontal/vertical preadjustments, 242 inside groove, 394

nasal edge, 236

nasal sides, equidistance, 241 screw, insertion/removal, 167f shape, change, 64

touching. See Frames

upper/lower rims, preshaping, 237f

F

Fabrication process, 19f overview, 1

proficiency test questions, 7 Face form, 241

Face hand edger, spherical section, 201f Facet, usage, 166

Faceted edge, usage. See Minus lens; Plus lenses Face-type hand edger, 190

effect, 191f

Factory-marked blended bifocal, 130f Fault line, 296

FDA. See Food and Drug Administration File marks. See Horizontal meridian Fining, 3f

Finished bifocals. See Stock finished bifocals mass production, 2

Finished blanks, 3f Finished lenses, 4f

record keeping requirements. See Partially finished lenses

sizes, 54 terminology, 2-4

Finished PD, 57 Finished surfaces, 4f Finishing

cycle, 322 laboratories, 1-2, 419

lens block, attachment, 51f process, overview. See Lenses

Finishing wheels

dressing, 324f. See also Metal-bonded finishing wheels

sticks, 323f retruing, 326

failure, 326f usage, 161-162 wear, 325

Fire evacuation route, 336

Fire extinguishers, availability, 337 Fire hazards, 331

Fire prevention, 338

First aid kit, availability, 337, 338f

Fitting cross, 43-44, 98-99. See also Progressive addition lenses

drop, 205 height, 45f

definition, 99f information, 173f

importance, 99 location, 102, 104f mismarking, 105f

raise. See Progressive lenses

system, usage. See Progressive lenses

usage, 109, 398-399, 426-427. See also Layout Fitting height. See Minimum fitting height Five-layer AR-coated lenses, 295

Flat edges, usage. See Rimless style eyewear Flat hand edger surface, disadvantage, 199f Flat surface touch test, 242

usage. See Parallelism testing

Flat-beveled lenses, 201f. See also Plastic flat-beveled lenses

Flat-front lenses, 179 Flat-top 28 lenses, 439f Flat-top 35 lenses, 440f

Frames (Continued) size, 28f

thin metal rims, 277f

usage. See Semirimless mountings Frame’s lens

hand edging, 202-203 reedging, 202-203 shape, change, 203-205

size, checking. See Metal frame lens size Franklin-style bifocals. See Centration skills series Franklin-style lenses, 171, 250, 439f

centration, 132f hand edging, 201 positioning, 283 rotation, 284 surfacing, 415

Franklin-style multifocals, 131 centration, 131

Free hand drilling, 262f Free-float bevel system, 162 Free-float method, usage, 324 Freehand scoring, 150 Fresnel Equation, 227

Front bevel

edge smoothing, 199 surface

edge smoothing, 194 smoothing, 193f

Front edge

bevel, following, 180f grooving, 280-282

Front lens curve, block matching, 142f

Front surface base curve, dotted line (indication), 165f Front vertex powers, usage. See Near add Front-to-front holding, 207f

Front-to-front placement, 119

G

Gap, creation, 87f

GCD. See Geometrical center distance General duty clause, 330 General-purpose-wear lens, 108f

Geometrical center, 40f, 41f. See also Edged lenses position, 84f

Geometrical center distance (GCD), 43, 82 Gerber-Coburn Step Two blocking system, 186

Glass. See Crown glass; High-index glass; Photochromic glass

Glass lenses, 3f cleaning, 208

crazing. See Crown glass drop-ball testing, 294 edge gloss, 207

edge polishing, 206-207

Glass lenses (Continued) edging, 322f hardening, 303-305 notes, 258-259

pin bevel, 201f sandblasting, 299 stress, exhibiting, 167

Glass pin bevels, size, 201f Glasses, defining. See Safety glasses Glaze, definition, 169

Glazed frame, 301 Glazed wheels, 322 Glazing, definition, 322 Good faith effort, 340 Gradient arm

setting, 221 usage, 222f

Gradient lenses. See Edged gradient lenses Gradient lines

achievement. See Level gradient line horizontality, 222f

straightness, 223f

Gradients. See Double gradients; Reverse gradient; Triple gradients

creation. See Smooth gradient

lens, dyeing. See Simple gradient lens tints, 220-224; 221f

Graph paper, usage, 60f Grinding

allowance, checking, 315

angles, comparison. See Hand edging Grit. See Wheels

size, 320-321 factor, 321f

types/purposes. See Hand-edger wheels Groove. See Bevel; Eyewire groove

centering, 286f

cleaning, ultrasonic cleaner (usage), 282f cutting, 280f

depth, 155. See also Wheels

location, 279f, 283. See also Basing groove location; Right-hand lens groove location

measurements, 43f mountings, 276

proficiency test questions, 290-291 positioning. See Edges

rims, tightening, 277f

safety beveling, 284-285, 285f touchup, 284

usability, 283f Groove position

basing, setting, 283f control lever, turning, 283f lens type, effect, 284t

Grooved Executive lenses, 283f Grooved frame

DBL, measurement, 43

A dimension, measurement, 43 Grooved lens, mounting, 286-289 Grooved wheel

design, 192f

hidden bevel edge configuration, 202f Groover. See Santinelli groover

centering pin, locking, 280f chucks, placement, 281f cutting wheel

cleanliness/coolness, 279f flush placement. See Wheels

depth dial, 278

settings, change, 281-282 setup, 278-279

switches, 280 zero-adjuster knob, 278

Grooving. See Back edge; Front edge; Middle edge; Polycarbonate lenses; Recessed metal rim

capability, 278f edge thickness, 277 edger, usage, 286

effect. See Impact resistance guide arms, lens positioning, 281f lens preparation, 278-279 methods, 277-286

process, commencement, 281f screen, 286f

Guide arms. See Spring-controlled guide arms lens positioning. See Grooving

lifting, 284

Guide wheel, usage, 164f Guided bevel systems, 162-164

usage, 171. See also Edgers example, 165f

Guided scoring, 150

H

Hairline cracks, 258 Half-eye blocks, usage, 141f

Half-eye lenses, blocks (usage), 141 Half-mounted lens, 260 Half-padded nylon jaw pliers, 288

Half-padded pliers, usage, 244f. See also Nylon cords

Hand drills, historical note, 258-259

Hand edgers. See Ceramic wheel hand edgers; Diamond wheels

coolant, disposal, 340

surface, disadvantage. See Flat hand edger surface types, 190-192

V-bevel grooves, usage, 191-192

Hand edging, 3f, 190, 202f. See also Antireflectioncoated lenses; Frame’s lens; Franklin-style lenses; Polycarbonate lenses

commencement, 196f cutting speed factors, 197b

grinding angles, comparison, 198f mistake, 196f

parts, 192

pressure, monitoring, 194-195 proficiency test questions, 209-211 rationale, 190

results, improvement rules, 194-197 rules, summarizing, 197

steps, order, 199t usage, 206f

wheel, listening, 195-197 Hand reduction. See Lens size Hand tools, usage, 338

Hand wheel, even wetting, 193f

Hand-beveled lenses, apex placement, 160-161 Hand-edger wheels, 199

flat surfaces, usage, 200f grits

fineness, 194 types/purposes, 192t

Hand-edging process, 194 Hand-marking. See Lenses Hard lenses, 215

Hard-coated lenses, dyeing, 226 Hardened residue, 215f Hardening, 3f, 6

Hazard Communication Program, 332 Hazard Communication Standard (HCS), 332,

345-346

Hazardous chemicals. See Potentially hazardous chemicals

list, 332-333, 345, 348

posting/labeling requirements, 335-336 presence, 334

Hazardous communication checklist, 334b Hazardous communication program

company policy, 345-347 sample, 345-347

Hazardous waste, 331 Hazards

awareness. See Electrical hazards; Slippery hazards; Wet hazards

control, 331 correcting, 334

engineering out, 340-341 OSHA impact, 331 prevention, 331

standards. See Chemical Hazard Communication Standard

Hazards (Continued) warning, 333

written communication program, 332 HAZCOM. See Chemical Hazard Communication

Standard

HCS. See Hazard Communication Standard Health effects, 333

Health hazard data, 350 Health training/education, 331 Heat sensitivities, 226

Heat transfer fluids, disposal, 340 Heat treating, 6

Heat-tempered glass, 303 Heat-tempered lens, dehardening, 305

Heat-treated lens, maltese-cross pattern identification, 305f

Heat-treating process, 303 Heat-treating unit, 202

Height. See Major reference point height; Segment height

Hex wrench, usage, 255, 257f Hidden bevel, 321

cosmetic advantage, 161f

edge configuration. See Grooved wheel edge shapes, 192f

Hidden circles, 103. See also Dotted hidden circles location, 35f

raise, calculation, 400

usage, 400-401, 428-429. See also Progressive addition lens centration; Progressive addition lenses

Hidden marks, 34. See also Progressive addition lenses Hidden-bevel lenses, 191-192

lens size reduction, 201 Hide-A-Bevel, 161 Hide-A-Bevel wheels

placement, advice, 163f usage, 162

High adds

power, amount. See Plastic flat-top lenses usage. See Adhesive pad blocking

High base metal blocks, 141f High bifocal segment, 32f High impact standard, 298 High mass impact test, 301

High minus lenses, 279f. See also Thick-edged high minus lenses

High near addition lens, creation, 123f

High plus aspheric lenticular lenses, OC blocking, 62 High plus lens

base curve steepness, 142f plus direction, 284f

High-impact marking requirements, 301 High-impact requirements. See Safety eyewear

High-impact testing requirements, 300-301 High-impact thickness requirements, 300 High-index glass, 168-169

High-index lenses, 168-169 dyeing, 226-227

High-index materials, 250

High-index minus lenses, thin centers, 277 High-index plastic, 169, 227, 250

lenses, 3f

edge polishing, 208 High-minus back curves, 199f High-minus lens, 179f, 251

back edge, pin beveling, 201f back pin bevel, application, 200f curvature, amount, 180f

rear surface, pin beveling, 199 High-plus lenses, 179f

edge locations, appearance, 164f High-velocity impact test

firing, 301 survival, 300

Hinges, angling, 243f Holding

area, relationship. See Adhesive pad back-to-back position, 252, 313 device, 18

mechanism, 17f

pliers, usage, 244f, 245f

proper technique. See Edge smoothing system, 261

Holes. See Patterns

180-degree line, correspondence, 47f back side, chipping, 254f chamfering/smoothing, 254-255 chipping, 255f

cone tools, usage, 259f

diameters. See Variable-hole diameters drilling, 254f, 269f

height, 261f location

marking. See Temporal hole specifications, transfer ability, 262

placement. See Central hole placement Homemade patterns, 54, 418

Horizontal 180-degree reference line, marking, 252f Horizontal alignment, MRP usage, 132f

Horizontal bar. See Pattern makers Horizontal compensation, 60 Horizontal decentration, 82, 395

calculation, 394, 396, 397

boxing system, usage, 50-52, 75-76 questions, 93

Horizontal eye, increase, 48f Horizontal lens size, 40