Sofia Iqbal, Mir Zaman, Daud Khan.
Optimal standard intraocular lens power based on biometry assessment.
J Postgrad Med Inst Jan ;20(1):21-4.

Objective: To evaluate optimal standard intraocular lens power (IOL) for high volume, high quality cataract patients in community eye care centres. Material and Methods: This retrospective study was conducted on patients having cataract from January 2004- June 2003 at Khyber Institute of Ophthalmic Medical Sciences, Hayatabad Medical Complex Peshawar. Medical record was reviewed and relevant data including patient`s age, sex, eye examined, preoperative and postoperative visual acuity, keratometry (K1, K2), axial length and the IOL power used was analysed by an epidemiologist by using SPSS software database. Results: Out of 500 patients with cataract 272 (54.4%) were males and 228 (45.6%)were females. The presenting pre-operative visual acuity was less than 3/60 in 77.6% patients. The post-operative visual acuity was 6/12 or better in 417 (83.4%) patients at the end of first week. Mean axial length was 23.00 mm (SD + 1.5). For males mean axial length was 22.6824±1.0985 mm and for females it was 23.1914 ±1.6917 mm. Mean IOL power was 21.8 D (SD +2.8). Mean IOL for males was 22.1952± 2.9170 D and for females was 21.3985 ± 2.6614 D. In 326 patients (65.2%), IOL used was in the range of 20.5 D to 22.5 D. Conclusion: Use of an optimal standard intraocular lens power based on biometry assessment, in community eye care centres would give optimal visual results. This study demonstrates that an IOL of +20.5- 22.5 dioptre power would leave most postoperative cataract patients with better vision.

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