Posters

Analysis of changes in accommodation and corneal viscoelastic properties prior to and after FemtoLASIK procedures in patients with myopia

Poster Details

First Author: E.Solodkova RUSSIA

Co Author(s):    O. Kuznetzova   S. Balalin                 

Abstract Details

Purpose:

To study changes in accommodation and corneal viscoelastic properties prior to and after Femto LASIK surgeries in patients with myopia.

Setting:

The Volgograd branch of S.Fyodorov Eye Microsurgery Federal State Institution.

Methods:

A prospective study of 70 patients (140 eyes) with myopia of various degree before and after Femto LASIK was undertaken. Mean patients’ age was 26,7±5,4 years (from 18 to 38 years), 24 males, 46 females. Preop and 1 month postop all patients underwent a complete ocular examination, comprising computer accomodography (Righton Speedy-K ver. MF-1, RIGHT MFG. Co., Ltd, Japan), assessing ratio of accommodative response (RAR), factor of micro-fluctuations (FMF), and evaluation of corneal viscoelasticity on Ocular Response Analyzer ORA («Reichert», USA), helping to find values of corneal compensated intraocular pressure (IOPcc), corneal hysteresis (CH) and corneal resistance factor (CRF).

Results:

After Femto LASIK patients with myopia showed a reliable postoperative decrease in FMF by 4,2% ( PreOp = 59,57±4,33, PostOp = 57,02±3,74, р≤ 0,05), increase in RAR by 25,5% ( PreOp = 0,35±0,21, PostOp = 0,47±0,32, р≤ 0,05), fall of IOPcc by 9,9% ( PreOp = 16,63±3,64, PostOp = 14,97±3,95, р≤ 0,05), аs well as reduction of  CH by 25,0 % ( PreOp = 11,53±5,64, PostOp = 8,64±1,24, р≤ 0,05) and CRF by 22,11% ( PreOp = 10,13±2,07, PostOp = 7,89±1,76, р≤ 0,05).

Conclusions:

Femto LASIK induces normalization of accommodation and decreases corneal compensated IOP, however impairing biomechanical properties of the cornea.

Financial Disclosure:

None