Author(s): Taylor SR, Lightman SL, Sugar EA, Jaffe GJ, Freeman WR, Altaweel MM, Kozak I, Holbrook JT, Jabs DA, Kempen JH. The impact of macular edema on visual function in intermediate, posterior, and panuveitis. Ocul Immunol Inflamm. 2012 Jun;20(3):171-81. doi: 10.3109/09273948.2012.658467. Epub 2012 Apr 24. PMID 22530874
Journal: Ocular Immunology And Inflammation, Volume 20, Issue 3, Jun 2012
PURPOSE To evaluate the impact of macular edema on visual acuity and visual field sensitivity in uveitis.
DESIGN This study utilized baseline data from the Multicenter Uveitis Steroid Treatment (MUST) Trial, a randomized, parallel treatment clinical trial comparing alternative treatments for intermediate, posterior and panuveitis.
PATIENTS & METHODS 255 patients (481 eyes with uveitis) recruited at 23 subspecialty centers. Visual acuity, optical coherence tomography and Humphrey 24-2 visual field testing.
RESULTS Macular edema was associated with impaired visual acuity (p < 0.01). Different phenotypes of macular edema were associated with different degrees of visual impairment: cystoid changes without retinal thickening were associated with moderately impaired visual acuity (-5 ETDRS letters), but visual acuity was worse in eyes with retinal thickening (-13 letters) and with both cysts and thickening (-19 letters). Uveitis sufficient to satisfy the study's inclusion criteria was associated with impaired visual field sensitivity, but eyes with macular edema had even worse visual field sensitivity (p < 0.01).
CONCLUSIONS The observation that macular edema substantially reduces visual function suggests macular edema itself is an important endpoint to study in the treatment of uveitis. As uveitis and macular edema both impair visual field sensitivity as measured by Humphrey 24-2 perimetry, both should be considered when evaluating patients with uveitis and raised intraocular pressure for glaucoma.