Recovery of visual field and acuity after removal of epiretinal and inner limiting membranes
Background:Visual acuity serves as only a rough gauge of macular function. The aim therefore was to ascertain whether central an assessment of the central visual field afforded a closer insight into visual function after removal of epiretinal membranes and Infracyanine-Green- or Trypan-Blue-assisted...
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Published in | British journal of ophthalmology Vol. 92; no. 2; pp. 220 - 224 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
BMA House, Tavistock Square, London, WC1H 9JR
BMJ Publishing Group Ltd
01.02.2008
BMJ BMJ Publishing Group LTD |
Subjects | |
Online Access | Get full text |
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Summary: | Background:Visual acuity serves as only a rough gauge of macular function. The aim therefore was to ascertain whether central an assessment of the central visual field afforded a closer insight into visual function after removal of epiretinal membranes and Infracyanine-Green- or Trypan-Blue-assisted peeling of the inner limiting membrane.Patients and methods:Fourty-three patients undergoing pars-plana vitrectomy for the removal of epimacular membranes and dye-assisted peeling of the inner limiting membrane using either Infracyanine Green (n = 29; group 1) or Trypan Blue (n = 14; group 2) were monitored prospectively for 12 months. Preoperatively, and 1, 6 and 12 months postoperatively, distance and reading visual acuities were evaluated; the central visual field was assessed by automated static perimetry.Results:Twelve months after surgery, distance and reading visual acuities had improved in both groups, but to a significant degree only in Trypan-Blue-treated eyes. The difference between the two groups was not significant. Likewise at this juncture, the mean size of the visual-field defect remained unchanged in Trypan-Blue-treated eyes (preoperative: 4.3 (SD 2.1) dB; 12 months: 4.0 (2.1) dB (p = 0.15)), but had increased in Infracyanine-Green-treated ones (from 5.3 (3.7) dB to 8.0 (5.2) dB (p = 0.027)).Conclusion:Unlike visual acuity, the central visual field had deteriorated in Infracyanine-Green-treated eyes but not in Trypan-Blue-treated eyes 12 months after surgery. Hence, as a predictor of functional outcome, testing of the central visual field may be a more sensitive gauge than visual acuity. Furthermore, Infracyanine Green may have a chronic and potentially clinically relevant effect on the macula which is not reflected in the visual acuity. |
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Bibliography: | istex:EF2E2004F9E395DE770E0FB8333E0614BFAFB199 ark:/67375/NVC-PDVMMG8V-S ArticleID:bj131862 PMID:18055572 local:bjophthalmol;92/2/220 href:bjophthalmol-92-220.pdf |
ISSN: | 0007-1161 1468-2079 |
DOI: | 10.1136/bjo.2007.131862 |