Posters

Corneal asphericity changes after implantation of intracorneal ring segment implantation (kera ring) in treatment of KC

Poster Details

First Author: R.Moussa EGYPT

Co Author(s):                        

Abstract Details

Purpose:

To evaluate the visual ,refractive and asphericity changes after ICRs implantation for treatment of KC

Setting:

Memorial institute for ophthalmic research, Giza, Egypt

Methods:

The study were done on 25 eyes of 23 keratoconus patients .ICRs (kera ring ) were implanted in intrastromal tunnel at 5mm inner diameter . 1or2 ICRS of 150-300µ thickness and 160-210 arc were implanted. Changes in uncorrected visual acuity (UCVA),best corrected visual acuity (BCVA) and refractive error (sphere ,cylinder )were assessed . keratometric values( k1,K2,Kmax) & corneal asphericity values anterior and posterior respectively (Q ant &Q post ) were measured with Pentacam .

Results:

There was clinically significant improvement regarding UCVA from 0.1±0.04 to 0.31±0.17 and BCVA improved from 0.37±0.15 to 0.46±0.1.The spherical error and cylindrical error shows significant decrease postoperatively(p<0.001) . K2 shows significant decrease (p0.001) while K1 and Kmax shows non-significant changes postoperatively (p=0.022)(0.469) respectively .Q anterior shows significant decrease from -1.29±0.55 to -0.78±0.77 (p<0.001) while Q posterior shows non-significant change (p =0.692).

Conclusions:

ICRs (kera rings) implantation for treatment of keratoconus changes the anterior corneal asphericity approximating the Q value to the ideal Q value(0.5)and improve the UCVA and the BCVA of patients besides decrease the refractive sphere and cylinder values.

Financial Disclosure:

None