ArticlePloS one2026
Impact of axial length correction in high intraocular pressure eyes on intraocular lens power calculation.
Article in PloS one, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThis study aimed to investigate the relationship between high intraocular pressure (IOP) effect on axial length (AL) and postoperative refractive error after cataract surgery.
methodsA retrospective study was conducted on cases that underwent cataract surgery for elevated IOP. AL was corrected based on the change in AL per 1 mmHg of IOP, and the predicted refractive error was evaluated at 3 months postoperatively. Preoperative and postoperative optical biometry was performed using the segmented refractive index method. Intraocular lens (IOL) power was calculated using both the SRK/T and Barrett Universal II (BU II) formulas.
resultsOptical biometry was obtained in 18 cases and 19 eyes before and after cataract surgery. A moderate correlation was observed between the change in IOP and AL (r = 0.687, P = 0.0012), with the change in AL per 1 mmHg of reduction in IOP calculated as 0.005 mm. The mean change in IOP was 38.87 ± 10.80 mmHg (P = 0.001), and the AL \ significantly shortened by 0.18 ± 0.09 mm (P = 0.001). The mean postoperative refractive errors were 0.36 ± 0.59 D with the SRK/T formula, 0.79 ± 0.58 D with the BU II formula, showing significantly more hyperopia (p = 0.001). After AL correction, the predicted refractive error was reduced to -0.08 ± 0.54 D (SRK/T) and 0.27 ± 0.55 D (BU II).
conclusionsIn cataract surgery for eyes with elevated IOP, using corrected AL based on the anticipated IOP reduction appears to decrease the predicted refractive error. Additionally, it should be noted that the BU II formula may result in a hyperopic shift in refractive prediction error, even when using the adjusted AL.
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