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M.J. Perez, C. Sanchez–Ramos, I. Moral–Martinez, A. Langa–Moraga, M. Sillero, M.C. Puell; Cataract Surgery Effects On Photostress Recovery Time And Contrast Sensitivity . Invest. Ophthalmol. Vis. Sci. 2006;47(13):638.
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To establish the influence of cataract surgery on the capacity to recover from a short exposure to glare and on contrast sensitivity determined with and without glare.
The study population was comprised of 1103 subjects (132 women, 971 men) aged 50 years or older (mean age 68 ± 6 years, range 50–90 years) divided into two groups according to whether they had undergone cataract surgery (n=121 or 11.03%; mean age 71 years) or had not been operated on (n=982 or 89%; mean age 67 years). Recovery times after exposure to a glare source for 10 s, and photopic and mesopic visual acuity were measured using an Ergovisión® instrument (Essilor). Contrast Sensitivity (CS) with and without glare was determined using the CGT 1000 (6 stimulus sizes –6.3 to 0.7 degrees; 12 levels of contrast –0.01 to 0.45; 8 peripheral glare sources) at photopic luminance levels. In each subject, a complete anamnesis was undertaken.
The mean photostress recovery time for the entire population was 69 ±42 s (range 6 – 258 s). Recovery times for the C1 (cataract operated subjects) and C2 (non cataract operated subjects) groups were 73 ±35 s and 68 ±41 s, respectively (P=0.26). The visual acuity loss recorded for the drop in luminance level was 0.5 ±0.2 and was unaffected by cataract surgery. The table shows the contrast sensitivity values obtained with and without glare for C1 and C2.
In our subjects, cataract surgery had no effects on the photostress recovery time, the visual acuity loss produced by a drop in luminance, or on disability glare. Cataract surgery did, however, show a significant negative effect on contrast sensitivity with glare for all stimulus sizes and without glare for intermediate target sizes.
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