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Posterior polymorphous corneal dystrophy patients as refractive surgery candidates

Poster Details

First Author: T.Bozkurt TURKEY

Co Author(s):                        

Abstract Details


The aim was to raise awareness about the association of corneal steepening and posterior polymorphous corneal dystrophy (PPCD)


Health Sciences University, Umraniye Training and Research Hospital Eye Clinic


Herein, we described two patients who were referred to Cornea Service for a second opinion for refractive surgery. Patient 1 was a 35-year-old female who was previously diagnosed as PPCD and presented for refractive surgery due to progressive worsening vision over the last couple of years following a relatively stable refraction of 7-8 years. Patient 2 was a 22-year-old male and referred for definitive diagnosis of central endothelial vesicular lesions with small paracentral bands in between these lesions on slit lamp examination. Both patients denied excessive eye rubbing and using contact lenses. Full ophthalmological examination was done including corneal topography.


Patient 1 had best spectacle-corrected distance visual acuity(BSCVA) was 20/20 in the right eye(RE) with �â�ˆ�’2.50(�â�ˆ�’1.25�Ã�—10�â�—�¦) and 20/25 in the left eye(LE) with �â�ˆ�’2.50(�â�ˆ�’0.75�Ã�—180�â�—�¦). Corneal topography of both eyes showed pronounced corneal steepening with an asymmetric bow-tie pattern with average keratometry values(AKV) of 48.40 and 48.27 in the RE and LE, respectively. Patient 2 had BSCVA of 20/20 in RE and 20/20 LE with -1.50(�â�ˆ�’1.75�Ã�—40�â�—�¦) and �â�ˆ�’0.75(�â�ˆ�’2.50�Ã�—20�â�—�¦), respectively. Corneal topography of RE didn�â�€�™t reveal a particular abnormal pattern, but LE showed an asymmetric bow-tie pattern and marked posterior elevation with AKV of 41.87 and 43.13 in RE and LE, respectively.


PPCD is conventionally considered as well-defined, isolated pathology of corneal endothelium. However, in recent years, there has been an emerging interest for the high association between PPCD and corneal steepening, but this association has still not been well classified. We think that it might be better to stay on the safe side and be conservative about refractive surgery in eyes with PPCD (even without corneal steepening) since we still do not know which eyes with PPCD are likely to show ectatic corneal changes on the long run.

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