Official ESCRS | European Society of Cataract & Refractive Surgeons
Vienna 2018 Delegate Registration Programme Exhibition Virtual Exhibition Satellites 2018 Survey


escrs app advert

A new automated gonioscope to evaluate angle details

Search Title by author or title

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


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


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


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.


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).


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:


Back to previous