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This abstract is assigned to session SBO-BOG Posters session >> in Poster area - Foyer +1

Title

Contrast sensitivity in eyes with different types of IOL implants: a pilot study

Purpose	To determine contrast sensitivity (CST) in eyes with either aspheric or spheric intra-ocular lens implants (IOLs) and compare those with eyes with cataract, and normal age-matched controls.
Methods	Eyes with either spherical or aspherical IOLs were tested for CST for 5 spatial frequencies (1.5, 3.0, 6.0, 12 & 18 cycles/degree) using the Vistech C configuration at different background illumination levels (mesopic 0.25, 0.8 & 2.5 cd/m2, and photopic (25.5, 80.5 & 255 cd/m2) and with best correction. All visual acuities were within the normal range for the eyes with IOLs and the normal controls.
Results	Contrast sensitivity levels were generally higher in eyes with aspheric IOLs than in those with spheric IOLs. This difference was more pronounced in mesopic than in photopic environments. In eyes with cataract, the CST was in keeping with observed decreases in best-corrected visual acuities.
Conclusion	Contrast sensitivity is better in eyes with aspheric IOLs than in those with spheric IOLs. This effect is more pronounced at low ambient light levels. Additional studies are needed to confirm these findings.

Author 1

Last name	DE DONCKER
Initials	R
Department	Department of Ophthalmology, Ghent University Hospital
City	Ghent, Belgium

Author 2

Last name	UVIJLS
Initials	A
Department	Department of Ophthalmology, Ghent University Hospital
City	Ghent, Belgium

Author 3

Last name	LEROY
Initials	BP
Department	Department of Ophthalmology, Ghent University Hospital
City	Ghent, Belgium

Author 4

Last name	KESTELYN
Initials	P
Department	Department of Ophthalmology, Ghent University Hospital
City	Ghent, Belgium