A new automated gonioscope to evaluate angle details

Session Details

Session Title: Anterior Segment Imaging II

Session Date/Time: Tuesday 25/09/2018 | 08:00-10:30

Paper Time: 08:24

Venue: Room A4

First Author: : P.José PORTUGAL

Co Author(s): :    F. Teixeira   D. Sousa   I. Leal   C. Neves   L. Pinto        

Abstract Details

Purpose:

To analyze the quality of NGS-1 prototype digital gonioscopy camera in capturing 360-degree iridocorneal angle images.

Setting:

Glaucoma clinic from the ophthalmology department at Hospital Santa Maria in Lisbon, Portugal.

Methods:

Prospective observational single-center study. Automatic gonioscopy using the new version of the NGS-1 automated gonioscope prototype was performed to consecutive patients in glaucoma clinic. 16 pictures per eye were screened representing the 360º angle. Quality assessment was performed by a masked observer using a Likert scale, ranging from 0 (best), 1 (medium) and 2 (worst). The best picture per quadrant was further analyzed concerning the number of angle morphologic details.

Results:

Forty-eight eyes of 26 subjects were examined. Mean age was 68 ± 12 years. The mean number of good quality images per eye was 9.42 ± 4.79. The mean image quality grade was 0.95 ± 0.61, with inferior quadrants having the best quality scores. Angle details most commonly encountered were Sampaolesi line, iris process/synechia and abnormal pigmentation, each having a mean number of angle details of 1.00 ± 0.57. A negative correlation was found between image quality and prior glaucoma surgery (p 0.01), pseudophakia (p 0.02) and higher intraocular pressure (p 0.03).

Conclusions:

These results suggest that the new version of automated gonioscopy is able to capture iridocorneal angle images (ICA) with a moderate quality. In addition to angle grading, this photographic capture of the ICA can provide details concerning pigmentation and peripheral iris morphology.

Financial Disclosure:

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