Cross-sectional pupillographic evaluation of relative afferent pupillary defect in age-related macular degeneration.
To evaluate, using pupillography, the difference between eyes affected by age-related macular degeneration and their contralateral normal eyes with regard to the mean relative afferent pupillary defect (RAPD) score. Also, to ascertain any correlations between this difference in RAPD score and differences in visual acuity or age-related macular degeneration (AMD) dimensions. Measurements were made using the RAPDx pupillographer (Konan Medical, Nishinomiya, Japan), which analyzes pupil response to light stimulation. Both best corrected visual acuity (converted to logMAR) and greatest linear dimension (GLD; calculated on the basis of fluorescence angiography images) were measured. The correlations between RAPD difference and logMAR difference, and GLD difference were then analyzed. The study included 32 patients (18 men, 14 women; mean age = 74.8 ± 9.7 years) who had AMD in 1 eye and a normal fundus in the contralateral eye. Mean resting pupil diameter, mean latency onset of constriction, mean velocity of constriction, and recovery were not significantly different in AMD eyes compared with normal eyes. The mean amplitude of constriction was smaller (P = 0.028), and the mean latency of maximum constriction was shorter (P = 0.0013) in AMD eyes than in normal eyes. Regarding RAPD scores, there was a significant correlation between visual acuity difference and RAPD score differences of both amplitude (P < 0.001, r = 0.53) and latency (P = 0.034, r = 0.33). GLD difference was also significantly correlated with differences in both amplitude (P = 0.021, r = 0.36) and latency (P = 0.033, r = 0.33) scores. RAPD outcomes were correlated with visual acuity and AMD dimension. Automated pupillography may be a useful tool in monitoring the progression of AMD and assessing changes in retinal function that result from novel interventions.
Department of Ophthalmology, Nagoya University Graduate School of Medicine, Showa, Nagoya, Aichi, Japan.
Kei
K
Takayama
Yasuki
Y
Ito
Hiroki
H
Kaneko
Yosuke
Y
Nagasaka
Taichi
T
Tsunekawa
Tadasu
T
Sugita
Hiroko
H
Terasaki
D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation*; D005260:Female; D005451:Fluorescein Angiography / Q000379:methods; D005654:Fundus Oculi; D006801:Humans; D008268:Macular Degeneration / Q000150:complications*; D008297:Male; D011680:Pupil / Q000502:physiology; D011681:Pupil Disorders / Q000000981:diagnostic imaging* / Q000209:etiology; D014792:Visual Acuity / Q000502:physiology
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