Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Experience of a contact lens clinic in fitting keratoconus patients with rigid gas-permeable contact lenses (RGPL)

Poster Details

First Author: A. Atanassov BULGARIA

Co Author(s):    M. Atanassov                    

Abstract Details


To present the corneal and RGPL parameters of a group of keratoconus patients and the correlations between them.


The study includes 49 eyes of 30 consecutive patients with keratoconus.


Corneal topography was performed with OCULUS Keratograph 5M and patients were fitted with rigid gas-permeable contact lenses. Corneal radii and RGPL base curve radii were recorded and correlated.


The mean flat corneal radius was determined to be 7,23 ±0,43 mm (min:6,34 max:8,16), the steep radius- 7,07±0,49 mm (min:6,12 max:7,83), the mean radius - 7,15±0,4 mm (min:6,36 max:7,95). The mean base curve of the rigid gas-permeable contact lenses was found to be 7,32±0,33 (min:6,60 max:8,00), the mean dioptric power - -4,47±3,93 dpt (min: -16.00 max: +2.5). No significant correlation was found between RGPL power and corneal radii (R mean corneal radius/RGPL power = -0,129 p=0,376, R flat corneal radius/RGPL power = -0,241 p=0,095, R steep corneal radius/RGPL power = 0,003 p=0,982). There was a stronger, although not significant correlation between RGPL base curve radius and steep corneal radius (R=0.276 p=0.055).


The corneal radii, found on corneal topography do not necessarily correlate with the best fit RGPL base radius.

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