Posters

Seven-year observation of posterior corneal elevation stability in moderate to high myopic eyes after SMILE

Poster Details

First Author: X.Zhou CHINA

Co Author(s):    Z. Chen   Y. Zhao   X. Zhou   F. Xia   J. Zhao        

Abstract Details

Purpose:

To investigate long-term changes in posterior corneal elevation of moderate and high myopia after small incision lenticule extraction (SMILE).

Setting:

Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, China

Methods:

In this prospective study, 33 eyes of 20 patients who underwent SMILE were included. All patients were divided into two groups based on preoperative spherical equivalent (SE): high myopia group (SE less than -6.0D) and moderate myopia group (larger than -6.0D and less than -3.0D). Changes in posterior corneal elevation at central points (PCE), the thinnest point (PTE), the maximal point (PME) and other 20 points within 4-mm area of best-fit sphere (BFS) were evaluated using Pentacam in 7-year follow-up.

Results:

At 7-year follow-up, PCE and PTE decreased significantly (p=0.040, 0.039), while PME showed statistically significant increment (2.45±1.02µm, p=0.017). High myopia group observed PME increment (p=0.041) and moderate myopia group observed PTE, PCE decrement (p=0.009, 0.031). No difference was found between two groups at 3-year and 7-year postoperatively. Changes in PCE, PME and mean posterior elevation negatively correlated with residual bed thickness.

Conclusions:

Long-term posterior corneal elevation was stable in moderate and high myopia after SMILE, with change in PME remaining observation.

Financial Disclosure:

None