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Minimally Invasive Refractive Surgery

5

 

Jorge L. Alio, Mohamad Rosman, and Samuel Arba Mosquera

5.1 Trends in Refractive Surgery

1.Laser vision correction

(a)Decreasing the amount of tissue ablation per dioptre treated

(b)Increasing the predictability of LASIK

(c)Reducing the incidence of complications associated with LASIK

(d)Decreasing the time required for the procedure

(e)Increasing the optical quality post-operatively

2.Phakic intraocular lens surgery

(a)Minimising incision size

With newer lens design

With newer materials

(b)Advances in diagnostic anatomy and PIOL sizing technology

(c)Decrease in complication rates

(d)Improving outcomes of phakic intraocular lens surgery

(e)Ability to treat all types of refractive errors

3.Presbyopic lens surgery

(a)Decreasing the incision size required

(b)Improved performance of lenses

Aspheric designs

Toric designs

5.2 Introduction

Refractive surgery is the newest subspecialty in ophthalmology, gaining popularity after the introduction

J. L. Alio ( )

Vissum, Instituto Oftalmologico de Alicante, Adva de Denia s/n, Edificio Vissum, 03016 Alicante, Spain

e-mail: jlalio@vissum.com

of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) in the 1980s and 1990s respectively. Whilst LASIK is the most popular refractive surgery technique today, it is by no means the only refractive surgery technique available. Rapid development in technology and surgical techniques in the field of refractive surgery has led to a wide range of surgical techniques available to the refractive surgeon today.

Refractive surgery techniques today can be broadly classified into corneal refractive surgery techniques, intraocular refractive surgery techniques and presbyopic correction techniques. Corneal refractive surgery techniques include techniques which correct refractive errors by reshaping the cornea either by surgery or by laser treatment. Corneal refractive surgery techniques include refractive keratotomy, astigmatic keratotomy and laser treatments like Advanced Surface Ablation techniques (including PRK and epi-LASIK) and LASIK. Intraocular refractive surgery includes techniques which involve intraocular surgery, for example phakic intraocular lens implantation. Presbyopic correction techniques include any technique which aims to correct presbyopia. These techniques include laser treatment, conductive keratoplasty, corneal inlays and the use of multi-focal intraocular lenses.

In all the types of refractive surgery techniques, the trend is towards minimising surgical incisions and invasiveness. Newer technology aims to improve the results of surgery while at the same time reducing the amount of tissue damage or manipulation required. However, unlike conventional ophthalmic surgeries where minimal invasive surgeries are measured by the size of the incisions, in refractive surgery techniques, minimal invasive surgeries are achieved by various other technological methods which will be discussed in the subsequent sections.

I. H. Fine, D. Mojon (eds.), Minimally Invasive Ophthalmic Surgery,

97

DOI: 10.1007/978-3-642-02602-7_5, © Springer-Verlag Berlin Heidelberg 2010