title: Quantifying Fundus Autofluorescence in Patients With Retinitis Pigmentosa.
abstract: Using quantitative fundus autofluorescence (qAF), we analyzed short-wavelength autofluorescent (SW-AF) rings in RP.
  
  
  
  Short-wavelength autofluorescent images (486 nm excitation) of 40 patients with RP (69 eyes) were acquired with a confocal scanning laser ophthalmoscope equipped with an internal fluorescent reference. Mean qAF was measured in eight preset segments (qAF8) and in region of interest (ROI)-qAF (200-700 μm) within and external to the borders of the rings at superior, temporal, and inferior sites relative to the ring. For both groups, qAF in patients with RP was compared to age-similar and race/ethnicity-matched healthy eyes at equivalent retinal locations.
  
  
  
  In 71% of eyes of RP patients, qAF8 acquired internal to the inner border of the ring, was within the 95% confidence interval (CI) for healthy eyes, while in the remaining RP eyes qAF8 was either higher or lower than the CI. Measured external to the ring, qAF8 values were within the CI in 47% of RP eyes with the other eyes being higher or lower. In 28% of sites measured by ROI-qAF within the SW-AF ring, values were above the 95% CI of healthy controls. Region of interest-qAF measured just external to the ring was within the CI of healthy eyes in 74% of locations. The average local elevation in qAF within the ring was approximately 15%. In SD-OCT scans, photoreceptor-attributable reflectivity bands were thinned within and external to the ring.
  
  
  
  Increased fluorophore production may be a factor in the formation of the SW-AF rings in RP.
authors.affiliation: Department of Ophthalmology, Columbia University, New York, New York, United States.
authors.forename: Kaspar
authors.initials: K
authors.lastname: Schuerch
authors.affiliation: Schepens Eye Research Institute and Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States.
authors.forename: Russell L
authors.initials: RL
authors.lastname: Woods
authors.affiliation: Department of Ophthalmology, Columbia University, New York, New York, United States.
authors.forename: Winston
authors.initials: W
authors.lastname: Lee
authors.affiliation: Department of Ophthalmology, Columbia University, New York, New York, United States.
authors.forename: Tobias
authors.initials: T
authors.lastname: Duncker
authors.affiliation: Schepens Eye Research Institute and Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts, United States.
authors.forename: François C
authors.initials: FC
authors.lastname: Delori
authors.affiliation: Department of Ophthalmology, Columbia University, New York, New York, United States 3Department of Pathology and Cell Biology, Columbia University, New York, New York, United States.
authors.forename: Rando
authors.initials: R
authors.lastname: Allikmets
authors.affiliation: Department of Ophthalmology, Columbia University, New York, New York, United States 3Department of Pathology and Cell Biology, Columbia University, New York, New York, United States.
authors.forename: Stephen H
authors.initials: SH
authors.lastname: Tsang
authors.affiliation: Department of Ophthalmology, Columbia University, New York, New York, United States 3Department of Pathology and Cell Biology, Columbia University, New York, New York, United States.
authors.forename: Janet R
authors.initials: JR
authors.lastname: Sparrow
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D005451:Fluorescein Angiography / Q000379:methods*; D005500:Follow-Up Studies; D005654:Fundus Oculi; D006801:Humans; D008297:Male; D008875:Middle Aged; D009887:Ophthalmoscopy / Q000379:methods*; D011446:Prospective Studies; D015203:Reproducibility of Results; D055213:Retinal Pigment Epithelium / Q000473:pathology*; D012174:Retinitis Pigmentosa / Q000175:diagnosis*; D013997:Time Factors; D041623:Tomography, Optical Coherence / Q000379:methods; D055815:Young Adult