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Correlation between static automated and scanning laser entoptic perimetry in normal subjects and glaucoma patients
D J Plummer1, A Lopez, S P Azen
1Shiley Eye Center, Department of Ophthalmology, School of Medicine, University of California, San Diego, La Jolla, California, USA.
Objective:
To compare the effectiveness of scanning laser entoptic perimetry with static automated perimetry as a noninvasive instrument for screening for glaucomatous damage in visually asymptomatic subjects within the central 60 degrees (diameter) of vision.
Design:
A masked cross-sectional study comparing entoptic perimetry to achromatic threshold perimetry.
Participants:
Twenty-three subjects and controls from the Sharp Rees-Stealy Hospital and the Shiley Eye Center at the University of California, San Diego.
Testing:
Virtual reality-based entoptic perimetry was compared with achromatic threshold perimetry.
Main Outcome Measures:
For each testing session, we compared the presence of a disturbance in the entoptic perimetry stimulus with the presence of defects in visual function as measured by Humphrey automated visual field perimetry.
Results:
Scanning laser entoptic perimetry reasonably estimates the overall visual field loss for moderate-to-severe scotomas as measured by the pattern deviation in standard visual field perimetry. Scanning laser entoptic perimetry has a sensitivity from 27% to 90% and a specificity from 50% to 100% for screening moderate-to-severe visual field defects caused by glaucoma within the central 60 degrees diameter of vision.
Conclusions:
Scanning laser entoptic perimetry may be an effective and inexpensive screening test in hospitals and community clinics for diagnosing visual field loss caused by glaucoma.