Optical and visual simulation of standard and modified spherical aberration implantable Collamer lens post myopic LASIK surgery.

Abstract

PURPOSE:

To evaluate the visual quality achieved in patients undergoing standard or modified implantable Collamer lens (ICL) to correct residual myopic error after laser-assisted in situ keratomileusis (LASIK) surgery.

METHODS:

The adaptive optics visual simulator was used to simulate LASIK surgery of moderate and high myopia with a myopic regression corrected by a standard and modified ICL. Visual acuity (VA) and contrast sensitivity (CS) were measured in 14 subjects at 3- and 4.5-mm pupil. Point spread function and simulated retinal images were calculated.

RESULTS:

Comparing LASIK plus standard ICL and LASIK plus modified ICL simulations, for moderate myopia, VA improvement was less than 1 line in all VA contrasts and both pupils evaluated. No statistically significant differences were found in CS between the simulations at any spatial frequency evaluated and for 3-mm pupil (p>0.05), but differences were significant at 4.5-mm pupil (p<0.05). For high myopia, the VA improvement was less than 1 line at 3-mm pupil, although it increased 2 or more lines at 4.5-mm pupil. Statistically significant differences were found in CS between the simulations for all spatial frequencies and both pupils evaluated (p<0.05), except for low and medium spatial frequencies at 3-mm pupil (p>0.05).

CONCLUSIONS:

These outcomes suggest that an ICL is a good option to correct the myopic residual error after myopic LASIK. When the ICL's spherical aberration is modified, the post-LASIK eyes of high myopia are the most benefited, as these eyes are more aberrated than after moderate myopic LASIK.

• Authors: Cari Pérez-Vives, Lurdes Belda-Salmerón, Santiago García-Lázaro, Teresa Ferrer-Blasco, Robert Montés-Micó
• Journal: European journal of ophthalmology (Eur J Ophthalmol) 2014 May-Jun Vol. 24 Issue 3 Pg. 330-7 ISSN: 1724-6016 [Electronic] United States
• PMID: 24057938 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Topics

• Aberrometry
• Adolescent
• Adult
• Contrast Sensitivity
• Corneal Wavefront Aberration (physiopathology)
• Female
• Humans
• Keratomileusis, Laser In Situ (methods)
• Lasers, Excimer (therapeutic use)
• Lens Implantation, Intraocular (methods)
• Male
• Myopia (physiopathology, surgery)
• Optics and Photonics
• Phakic Intraocular Lenses
• Postoperative Period
• Visual Acuity (physiology)
• Young Adult