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  • Title: A clinical index for predicting visual acuity after cataract surgery.
    Author: Graney MJ, Applegate WB, Miller ST, Elam JT, Freeman JM, Wood TO, Gettlefinger TC.
    Journal: Am J Ophthalmol; 1988 May 15; 105(5):460-5. PubMed ID: 3369514.
    Abstract:
    We developed a clinical index for predicting postoperative visual acuity of cataract patients and cross-validated it using data from 182 patients aged 70 years and older. The index consisted of four statistically combined indicators: age, preoperative visual acuity, frequency of reading, and comorbidity. Validation of the index included comparisons to two standard technical instruments for measurement of retinal visual acuity. For the clinical index, 72% of predictions were accurate within one Snellen line of postoperative visual acuity compared to 37% using a laser interferometer and 33% using a potential acuity meter. Testing of the clinical index's external validity using data from 111 patients in a different ophthalmology clinic disclosed 61% of predictions accurate within one Snellen line.
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