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Analysis of preoperative factors predictive of visual acuity in axial myopia
Y Kora1, E Nishimura, T Kitazato
1Department of Ophthalmology, Hamamatsu Medical Center, Shizuoka, Japan.
Purpose:
To identify the factors predicting visual acuity after cataract surgery in patients with high myopia.
Setting:
Departments of Ophthalmology, Showa University School of Medicine and Showa University Fujigaoka Hospital, Kanagawa, Japan.
Methods:
Stepwise regression analysis was used to identify the factors determining the visual acuity in 940 eyes with an axial length of 27.0 mm or longer having cataract surgery. Using a formula derived from the stepwise regression analysis, the predicted postoperative visual acuity was compared with the actual value measured in another group of 104 eyes.
Results:
Five factors were identified to significantly determine postoperative visual acuity: axial length, age, corneal opacity, refractive power of the cornea, and history of retinal detachment surgery. There was a significant relationship between predicted and actual postoperative visual acuities (r = .51, P < .001). Postoperative visual acuity was similar in 63% of cases.
Conclusion:
The results showed that at least five factors determine visual acuity after cataract surgery in patients with high myopia.