First Author: T.Siempis UK
Co Author(s): A. Balcombe Z. Koshy
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To evaluate biometry data obtained through A-scan (Alcon), Lenstar (Haag-Streit) and IOL Master (Zeiss) in patients with macula-off retinal detachment (RD)
Day Surgery Unit of a teaching hospital
Retrospective analysis through case note review
21 patients were identified. A-scan had 100% success rate in obtaining the AL comparing to 81% for Lenstar and 75% for IOL master. Mean AL( mm) for the affected eye was 24.14 (A-scan), 22.86 (Lenstar), and 22.68 (IOL master). Mean difference in AL between eyes was 0.33mm, 2.03mm and 2.16mm respectively. No statistically significant difference was observed. Mean suggested power of lens for emmetropia (409M-Zeiss) was 19D, 23D and 25D (A-scan, Lenstar and IOL Master respectively). In 77% of patients there was a difference of more than 1D in the suggested lens power for emmetropia.
There is considerable variation in biometry measurements in macula off RDs with A-scan being more reliable. Ideally all three methods should be used in this subtype of patients.