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Anterior chamber depth associated with predictability of IOL power calculations
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CHICAGO — Low anterior chamber depth diminished the predictability of IOL power calculations, according to a study presented here.
“With the advent of modern technologies, patients’ refractive expectations are increasing,” Nir Shoham-Hazon, MD, said at the American Society of Cataract and Refractive Surgery meeting. “Despite the accuracy of postoperative refractive outcomes, for some special patient groups it’s hard to deliver on those expectations.”
Dr. Shoham-Hazon and colleagues set out to assess the predictability of IOL power calculations in eyes with anterior chamber depth of 3 mm or less and axial length between 22.5 mm and 23.5 mm.
The retrospective study included 74 pseudophakic eyes. The Holladay 2 formula was used to make preoperative IOL calculations. Predictability was defined as postoperative refraction minus target refraction.
Mean anterior chamber depth was 2.5 mm. Mean IOL power was 23.76 D.
Deviation from target refraction was significantly greater in eyes with anterior chamber depth of 2.25 mm or less compared with eyes with anterior chamber depth greater than 2.25 mm (P = .02). The greatest deviation correlated with IOL power of 2 D, Dr. Shoham-Hazon said.
- Disclosure: Dr. Shoham-Hazon has no relevant financial disclosures.