Abstract
The aim of the study is to determine the average intra-ocular lens power (IOL) for Sudanese patients with senile cataract. To contribute towards cataract treatment in Sudan and blindness prevention the goal of VISION 2020: The Right to Sight. Methods: Descriptive, cross-sectional, hospital based study was conducted in Makkah Eye Complex in Khartoum Alryad; in the period (October 2009-July 2010). Elderly patients (300); their age varied 60-95 years with senile cataract were asked to participate in the study. Participation was entirely voluntary. Information was collected by means of interview, clinical assessment and ocular measurements. The data were analyzed using SPAW Statistics-18 (2010) a modified version of SPSS. Results: The average horizontal corneal power (K1) for right eye (RE) 42.70D (SD ±1.625) and left eye (LE) 43.59D (SD±1.879).The average vertical corneal power (K2) for RE 43.97D (SD ±1.710) and left LE 44.85D (SD ±1.919). The average axial length is 23.72mm (SD ±1.143) and 23.16mm (SD ±0.939) for the RE and LE respectively. The average IOL power for Extra-capsular cataract extraction (ECCE); with IOL to be implanted in the posterior chamber (PCIOL) was calculated to be 20.03D (SD ±1.409) for the RE and 20.19D (SD ±2.639) for the LE. However, for Phacoemulsification (Phaco) the IOL power is calculated to be 20.06D (SD ±1.740) and 21.17D (SD ±1.658) for the RE and LE respectively. Conclusions: The average corneal power was found be (42-45D), axial length (23-24mm), where as the IOL power (20-21D); similar to international standards. In this study the biometric measurements were considered pre-operatively for all patients studied. Changes in biometric measurements after cataract extraction were not investigated since it wasn't part of the research objective; however, further studies are recommended to determine the influence of cataract extraction in corneal power, curvature, thickness, depth of anterior chamber and axial length.
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