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Prospective evaluation of the effect of pseudophakic cystoid macula edema on contrast sensitivity
H E Ibanez1, M P Lesher, L J Singerman
1Case Western Reserve University, Cleveland, Ohio.
Objective:
To evaluate the effect of pseudophakic cystoid macular edema (PCME) on contrast sensitivity.
Design:
Best-corrected visual acuity, fluorescein angiogram, and contrast sensitivity measurements were obtained before surgery and at 8 weeks and 8.5 months after surgery. Eyes were classified as having no PCME, transient PCME, or persistent PCME.
Participants:
The study population consisted of 31 consecutive patients undergoing extracapsular cataract extraction with posterior chamber intraocular lens implantation between September 1990 and March 1991.
Main Outcome Measurements:
Outcomes were best-corrected visual acuity and contrast sensitivity.
Results:
Analysis of variance showed a significant decrease for all spatial frequencies at 8 weeks (P < .005) and for higher frequencies at 8.5 months (P < .05) in both PCME groups and for higher frequencies at 8 weeks in the transient PCME group.
Conclusion:
Decrease in contrast sensitivity associated with PCME may account for persistent visual difficulties despite good Snellen visual acuity.