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Assessment of intraocular pressure in hyperopic LASIK

Poster Details

First Author: A.Bahadir-Kilavuzoglu TURKEY

Co Author(s):    T. Bozkurt   C. Cosar   A. Sener        

Abstract Details



Purpose:

To evaluate the intraocular pressure (IOP) change after hyperopic laser-assisted in situ keratomileusis (LASIK).

Setting:

Cornea and refractive surgery subspecialty practice

Methods:

Sixty-six eyes of 34 hyperopic patients who underwent LASIK surgery at Acibadem Maslak Hospital were enrolled in this retrospective study. Pneumotonometry was used to measure IOP before and after the surgery. The patients' preoperative and postoperative intraocular pressure, central corneal thickness and mean keratometry values were evaluated. The patients' preoperative spherical equivalent refraction (attempted correction) data were also recorded.

Results:

Preoperative mean spherical equivalent was 2.35±1.26 (-0.25 - +5.0) D. Mean IOP was 16.63±3.12 (11 - 25) mmHg preoperatively and 14.84±3.05 (10 - 22) mmHg postoperatively (n=66, p<0.01, paired sample t test). But this decrease in IOP was not correlated with attempted correction (n=66, p>0.05, Pearson correlation). Mean central corneal thickness was 564.75±35.99 (488 - 650) μm preoperatively and 553.53±41.21 (498 - 637) μm postoperatively (n=26, p>0.05, paired sample t test). Mean increase in keratometry values after the surgery was 1.59±1.20 (-1.00 - 4.63) D.

Conclusions:

This study revealed lower postoperative IOP measurements in hyperopic LASIK treatment. Since the change in central corneal thickness after LASIK was not significant, the decrease in IOP was attributed to flap cutting and weakening in biomechanics of the cornea. This underestimation of IOP should be considered in hyperopic LASIK patients. FINANCIAL INTEREST: NONE

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