What Is The Right Intraocular Lens Power For Cataract Surgery On Eye Safaris?
Abstract
A cross sectional study was done to determine the intraocular lens (IOL)
power for cataract surgery safaris, and to ascertain the relationship
between both refractive status of the fellow eye and corneal diameters with
IOL power. Patients with cataract were assessed in Kenyatta National
Hospital Nairobi, Light House for Christ Eye Centre Mombasa and Lions
Sight First Hospital Nairobi. Biometry (contact and immersion methods),
corneal diameter measurements and refraction of fellow eyes were carried
out. The average IOL power from the biometry results was computed. This
was related to the IOL power calculated using refractive status of the fellow
eye and to corneal diameters. The standard IOL powers resulting from this
study PC IOL powers: Alcon 2L50D, Aurolab 2L50D, Fred Hollows 2LOOD,
Omni 2 L50D; AC IOL power: Alcon, Aurolab, Omni 18.00D) vary from
commonly used standard IOL powers. It was found that the average IOL
power for females differs from that for males. The standard IOL power
would give 66%,78% and 71% of the study sample postoperative refractions
of within ±ID, +2D and -2/+0.5D of emmetropia respectively. This study
found that immersion method biometry was not tolerated well by the
predominantly rural patients. Recommendations from this study include the
use of individual biometry as far as possible and where this is not possible
the use of the above standard IOL powers
Citation
Master of Medicine in Ophthalmology at the University of Nairobi, 2001.Publisher
University of Nairobi Faculty of Medicine