Abstract
BackgroundTo evaluate the distribution of biometric parameters and corneal astigmatism using the IOLMaster device before phacoemulsification in cataract patients in Central China.MethodsConsecutive cataract patients were recruited at the Central Hospital of Wuhan between January 2015 and June 2016. Ocular axial length (AL), keratometry values, anterior chamber depth (ACD) and horizontal corneal diameter (white to white [WTW]) of each cataract-affected eye were measured with the IOLMaster device.ResultsThe study evaluated 3209 eyes of 2821 cataract patients. The mean AL, ACD, and WTW were 24.38 ± 2.47 mm, 3.15 ± 0.48 mm, and 11.63 ± 0.43 mm, respectively. Corneal astigmatism of 0.51–1.00 diopters (D) was the most common range of values (34.96%). A total of 10.56% patients exhibited a corneal astigmatism greater than 2.0 D. The flat and steep keratometry values gradually increased with age. The mean ACD and WTW showed increasing trends as the AL increased (P < 0.001). When the AL was shorter than 26.0 mm, the keratometry decreased as AL increased. The against-the-rule (ATR) astigmatism proportion increased with age and the with-the-rule (WTR) astigmatism proportion decreased with age.ConclusionsThe profile of ocular biometric data and corneal astigmatism may help ophthalmologists improve their surgical procedures and make an appropriate IOL choice to gain a high quality of postoperative vision.
Highlights
To evaluate the distribution of biometric parameters and corneal astigmatism using the IOLMaster device before phacoemulsification in cataract patients in Central China
Distribution of ocular biometry This study evaluated 3209 eyes of 2821 cataract patients
When the axial length (AL) was shorter than 26.0 mm, the keratometry values (K1, Steep keratometry (K2), and K) decreased with an increase in AL
Summary
To evaluate the distribution of biometric parameters and corneal astigmatism using the IOLMaster device before phacoemulsification in cataract patients in Central China. Accurate measurement of ocular axial length, keratometry, anterior chamber depth and corneal diameter before cataract surgery is crucial for obtaining the precise degree of implanted intraocular lens (IOL) to control the postoperative diopter (D) value plus or minus 0.50 D as well as to achieve satisfactory postoperative refractive results and improve the visual quality for cataract patients [1, 2]. Most previous studies of preoperative ocular biometry and corneal astigmatism on cataract patients focused on the European and American populations [5,6,7,8].
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