Original articleEffect of cataract extraction on frequency doubling technology perimetry☆
Section snippets
Methods
Subjects were recruited prospectively from the outpatient ophthalmology clinics of the two faculty members (M.S.K. and H.W.T.) at the Asan Medical Center, Seoul, Korea, between October 2002 and September 2003. For each patient with visually important cataracts in both eyes, one eye was chosen at random to be enrolled in the study. Each patient underwent visual field evaluations on two different days within a span of 1 week, occurring 1 month before and 4 to 6 weeks after cataract extraction.
Results
Fifty-two eyes of 52 patients (mean age, 63.9 ± 12.8 years) were entered into the study prospectively. Of these patients, 5 had nuclear sclerotic type cataracts, 10 had cortical type, 7 had posterior subcapsular type, and 30 had mixed type cataracts. Their mean preoperative visual acuity was 0.48 ± 0.2 (range, 0.2–0.7 in logMAR scale), and their mean postoperative visual acuity was 0.11 ± 0.1 (range, 0–0.4 in logMAR scale, P < .0001).
Improvements in mean values of MD were observed by both FDT
Discussion
We have shown here that significant changes in visual field indexes, as measured by both FDT and SITA-fast perimetry, occurred after cataract extraction. Previous studies have shown that media opacity, such as cataract, uniformly depressed white-on-white conventional perimetry, including foveal threshold.10, 11, 12 These findings indicated that cataract extraction resulted in improvement of retinal sensitivity and MD postoperatively, both in glaucomatous and nonglaucomatous eyes.17, 18, 19, 20,
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References (35)
- et al.
Frequency doubling technology perimetry for detection of glaucomatous visual field loss
Am J Ophthalmol
(2000) - et al.
Algorithm for interpreting the results of frequency doubling perimetry
Am J Ophthalmol
(2000) - et al.
Comparison of frequency doubling perimetry with Humphrey visual field analysis in a glaucoma practice
Am J Ophthalmol
(2000) - et al.
Patterns of early visual field loss in open angle glaucoma
Am J Ophthalmol
(1987) Diffuse visual field loss in open-angle glaucoma
Ophthalmology
(1991)- et al.
Quantifying visual damage caused by cataract
Am J Ophthalmol
(1988) - et al.
Effect of cataract on automated perimetry
Ophthalmology
(1991) - et al.
Cataracts and open-angle glaucoma. The effect of cataract extraction on visual fields
Am J Ophthalmol
(1971) - et al.
The effect of simulated cataract on the glaucomatous visual field
Ophthalmology
(1993) - et al.
A prospective three year study of response properties of normal subjects and patients during automated perimetry
Ophthalmology
(1993)
Mean visual acuity
Am J Ophthalmol
Identification of glaucoma-related visual field abnormality with the screening protocol of frequency doubling technology
Am J Ophthalmol
The effects of cataract extraction on the visual field of eyes with chronic open-angle glaucoma
Am J Ophthalmol
Learning effect, short-term fluctuation, and long-term fluctuation in frequency doubling technique
Am J Ophthalmol
Frequency-doubling in visual responses
J Opt Soc Am
Nonlinear visual responses to flickering sinusoidal gratings
J Opt Soc Am
Performance of nonlinear visual units in ocular hypertension and glaucoma
Clin Vis Sci
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