Calibration Of The Infrared Optometer

Item

Title
Calibration Of The Infrared Optometer
Date
1962
Index Abstract
Coming Soon
Photo Quality
Complete
Report Number
AMRL TDR 62-88
Creator
Allen, Merrill J.
Corporate Author
Indiana Univ Bloomington
Laboratory
Life Support Systems Laboratory
Extent
16
Identifier
AD0288884
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(616)-6146
DoD Project
7163
DoD Task
716303
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Abstract
An infrared optometer for measuring the absolute status of accommodation is subject to a constant error not associated with chromatic aberration or changes in fixation. The reflections of infrared light within the eye cannot be considered to originate from the retina or pigment epithelium alone. Probably the choroid and sclera are involved giving a diffuse reflection and increased intraocular stray light. A schematic eye, using a retina of 2-mm. opalescent plexiglas with a sanded surface, approximately simulates the behavior of the human eye. Changes in fixation have only a slight effect on optometer accuracy as long as the pupil does not vignette the optometer beam. A modification is described for calibrating the infrared optometer for an individual subject without using trial lenses or a subjective optometer.
Report Availability
Full text available
Date Issued
1962-08
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Media
AMRLTDR62-088.pdf