To determine age-adjusted reference values of the visuALL Field Analyzer (vFA) retinal sensitivity and to assess the repeatability of the measured values and compare them with those measured by a Standard Automatic Perimetry (SAP).
Standard Automatic Perimetry (SAP) is the gold standard test for the evaluation of central and peripheral retinal sensitivity to light for detection and monitoring optic nerve diseases such as glaucoma. The current device has its own limitation such as positioning for the duration of the test which makes is hard for older patients especially those with back or other musculoskeletal diseases, artifact of the corrective lenses used to accommodate the patients refractive errors, etc. Several devices have been developed since the advent of the Octopus Perimeter 3-5 and the Humphrey Field Analyzer (HFA), in an effort to improve the test reliability and patient comfort. The main goal of this study is to evaluate the repeatability of a novel psychophysical platform that takes advantage of a Head Mounted Device (HMD) with eye tracking capabilities. Other objectives of this study include the development of an initial reference database and comparison of the measured parameters with HFA.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
72
Standard Automatic Perimetry (SAP) Humphrey Field Analyzer (HFA) 24-2, Swedish Interactive Threshold Algorithm (SITA) Standard Strategy measures peripheral and central vision in an ophthalmic setting.
visuALL Field Analyzer a new portable hardware and software virtual reality system measures peripheral and central vision to improve early detection of glaucoma damage in a non ophthalmic setting.
Wills Eye Hospital
Philadelphia, Pennsylvania, United States
Mean Retinal Sensitivity From Two Machines
Mean (Average) retinal sensitivity to light as measured in decibels in multiple spots across the central and peripheral retina (entire visual field). Higher numbers translate to dimmer light which when detected means better vision.
Time frame: three hours
Global Correlation (Agreement Between Two Machines in the Overall Visual Field)
Correlation (Agreement) between Humphrey Visual Field and VisuALL retinal sensitivity as measured by mean deviation (light measurement in decibels) in multiple spots across the central and peripheral retina (entire visual field). This is the amount of agreement of the measure threshold, which is the lowest level of light detected in different points across the visual field (overall), between two testing machines.
Time frame: three hours
Inferior Nasal Quadrant Correlation (Agreement Between Two Machines in the Inferior Nasal Visual Field)
Correlation (Agreement) between Humphrey Visual Field and VisuALL retinal sensitivity as measured by mean deviation (light measurement in decibels) in multiple spots across the inferior nasal visual field. This is the amount of agreement of the measure threshold, which is the lowest level of light detected in different points across the inferior (lower) nasal portion of the visual field, between two testing machines.
Time frame: three hours
Superior Hemifield Correlation (Agreement Between Two Machines in the Superior Hemifield Visual Field
Correlation (Agreement) between Humphrey Visual Field and VisuALL retinal sensitivity as measured by mean deviation (light measurement in decibels) in multiple spots across the superior (upper) hemifield portion of the visual field. This is the amount of agreement of the measure threshold, which is the lowest level of light detected in different points across the visual field in the superior hemifield, between two testing machines.
Time frame: three hours
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