A clinical index for predicting visual acuity after cataract surgery.
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.
Graney
M J
MJ
Department of Biostatistics and Epidemiology, University of Tennessee, Memphis.
Applegate
W B
WB
Miller
S T
ST
Elam
J T
JT
Freeman
J M
JM
Wood
T O
TO
Gettlefinger
T C
TC
D000368:Aged; D002387:Cataract Extraction; D005544:Forecasting; D006801:Humans; D007368:Interferometry / Q000295:instrumentation / Q000379:methods; D007834:Lasers; D008962:Models, Theoretical; D009885:Ophthalmology / Q000295:instrumentation; D011184:Postoperative Period; D014792:Visual Acuity