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Br J Ophthalmol 2001;85:1432-1436 ( December )

Scientific correspondence

Short wavelength automated perimetry in age related maculopathy Andreas Remkya, Kristina Lichtenberga, Ann E Elsnerb, Oliver Arenda

a Department of Ophthalmology, Medical School of the Technical University of Aachen, 52057 Aachen, Germany, b Schepens Eye Research Institute, Harvard Medical School, 20 Staniford Street, Boston, MA 02114, USA

Correspondence to: Dr Andreas Remky, Department of Ophthalmology, RWTH Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany

Accepted for publication 5 June 2001

BACKGROUND/AIMS---Previous studies reported the predictive value of the short wavelength sensitive (SWS) cone mediated sensitivity for visual outcome in age related macular degeneration. In this study SWS sensitivity was measured by commercially available blue on yellow perimetry in patients with non-exudative age related maculopathy (ARM) and compared with the presence of morphological risk factors and the status of the fellow eye.
METHODS---In a prospective cross sectional study, 126 patients (57 males, 69 females, mean age 71 (SD 6) years) with ARM (visual acuity >20/50) were tested. Central visual fields (blue on yellow) were obtained with a conventional perimeter. Fundus slides were graded by two independent observers for soft drusen and presence of focal hyperpigmentation.
RESULTS---Mean sensitivity and standard deviation of all patients exhibited a significant reduction with age. Patients with soft drusen had significantly lower sensitivity than those without, whereas there were no differences in visual acuity (log MAR). Sensitivity was also reduced in those eyes with fellow eyes having a sight threatening complication of age related macular degeneration (AMD). Eyes with focal hyperpigmentation compared with those without had no loss of sensitivity, but did have a significant decrease in the central part of the field compared with the more eccentric.
CONCLUSION---SWS sensitivity loss is associated with common risk factors for progression to AMD. Short wavelength automated perimetry is moderately rapid and readily available. It may serve as a tool in future ARM trials.

© 2001 by British Journal of Ophthalmology


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