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Titolo:
MODIFYING A RODENSTOCK SCANNING LASER OPHTHALMOSCOPE FOR IMAGING DENSITOMETRY
Autore:
TORNOW RP; BEUEL S; ZRENNER E;
Indirizzi:
UNIV TUBINGEN,AUGEN KLIN,SCHLEICHSTR 12 D-72076 TUBINGEN GERMANY UNIV TUBINGEN,HOSP EYE,DEPT PATHOPHYSIOL VIS & NEUROOPHTHALMOL D-72076 TUBINGEN GERMANY
Titolo Testata:
Applied optics
fascicolo: 22, volume: 36, anno: 1997,
pagine: 5621 - 5629
SICI:
0003-6935(1997)36:22<5621:MARSLO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTORECEPTOR ALIGNMENT; SPECTRAL REFLECTANCE; FUNDUS; DENSITY;
Keywords:
RETINAL DENSITOMETRY; HUMAN PHOTOPIGMENTS; SCANNING LASER OPHTHALMOSCOPY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
R.P. Tornow et al., "MODIFYING A RODENSTOCK SCANNING LASER OPHTHALMOSCOPE FOR IMAGING DENSITOMETRY", Applied optics, 36(22), 1997, pp. 5621-5629

Abstract

The necessary modifications and technical requirements are described for using a commercially available scanning laser ophthalmoscope (Rodenstock Model 101 SLO) as an imaging densitometer to assess human photopigment distribution. The main requirements are a linear detector amplifier, fast shutters for the laser beams, and a trigger unit. Images must be compensated for varying laser intensity. Both rod and cone photopigments are measured with the 514-nm argon laser of the SLO. Discrimination is possible owing to the different spatial distribution. The cone pigment density peaks in the foveal center (D = 0.40) with a steepdecrease with increasing eccentricity E (full width at half-maximum, 2.5 degrees). Rod photopigment increases with increasing eccentricity (D = 0.23 for E = 11 degrees). These values are in agreement with previous reported results obtained with scanning laser ophthalmoscopes specially designed for retinal densitometry and high stability. (C) 1997 Optical Society of America.

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Documento generato il 25/11/20 alle ore 01:31:14