Spaeth/Richman Contrast Sensitivity Test

Study Results

Results available

Outcome measurements, participant flow, baseline characteristics, and adverse events have been published for this study.

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

314 participants

Study Classification

INTERVENTIONAL

Study Start Date

2010-01-31

Study Completion Date

2014-04-30

Brief Summary

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The Spaeth-Richman Contrast Sensitivity (SPARCS) test is a new method of assessing contrast sensitivity. The test, another way to measure vision, is performed on any standard computer with internet access. Patients will be tested with SPARCS and with the standard Pelli-Robson contrast test.

Detailed Description

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Contrast Sensitivity is another way to test vision. It uses black on a white background and minimally decreases the black (grey) until it blends with the white. The least amount of contrast (faint grey) seen translates into amount of vision. This new method of determining contrast sensitivity uses black and white vertical bars and does not require recognizing letters in the alphabet. It tests various areas of the visual field and central vision. The test takes approximately 3 minutes per eye.

Pelli-Robson is a commonly used contrast sensitivity test that uses black letters on a white background. The letter size stays the same, only the amount of black changes, becoming greyer, making letters hard to see. The test takes approximately 1 minute per eye.

Hypothesis: A method of determining contrast sensitivity that does not require letter recognition (as does the Pelli-Robson test) eliminates the barriers of literacy and pattern recognition, to permit a more valid determination of contrast sensitivity.

Patients will perform SPARCS and Pelli-Robson twice; once each with two separate observers for reproducibility and intra-observer reliability. The order of testing will be randomized to SPARCS, Pelli, Pelli, SPARCS or Pelli, SPARCS, SPARCS, Pelli.

Conditions

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Glaucoma

Keywords

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Contrast Sensitivity Pelli-Robson Test

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Contrast sensitivity, another means of testing vision, will be measured two ways for each participant. One method uses the Pelli-Robson Contrast Sensitivity Chart which is mounted on the wall, the other method uses a new computerized program called Spaeth/Richman Contrast Sensitivity Test also known as SPARCS.

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

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Glaucoma

154 glaucoma, ocular hypertension and glaucoma suspect patients will have contrast sensitivity measured by Spaeth/Richman Contrast Sensitivity Test (SPARCS) and Pelli-Robson Contrast Sensitivity Chart.

Group Type ACTIVE_COMPARATOR