Ametropia Measurements from the Visual Evoked Response (VER).

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Abstract:

Subjects were tested to determine their refractive status using the computer-derived Visual Evoked Response VER. Measurements were sensitive to plus or minus 0.25 D sphere, or better. The high degree of precision was attributed to use of a difference curve analysis, the Oz-Pz electrode montage, small size pattern elements, and small graduations in test lens size. The values obtained by VER methods indicated more myopia than values obtained by standard techniques. The VER tests were conducted in darkness, and the results may be an objective measure of night myopia. A program is suggested for semiautomatic refractive measurements by digital computer. Author

Author(s):
Duffy, Frank H. ; Rengstorff, Roy H.
Author Organization(s):
EDGEWOOD ARSENAL MD
Descriptive Note:
Technical rept. Jan-Nov 69,
Pagination:
0026

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
EA-TR-4507
Project Number(s):
DA-1-B-562606-AD-22
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*VISION, REFRACTION), (*REFRACTION, MEASUREMENT), (*EYE, DISEASES), ELECTROPHYSIOLOGY, RESPONSE, DIGITAL COMPUTERS, VISUAL ACUITY, RETINA, ELECTROENCEPHALOGRAPHY, PHYSIOLOGY, OPHTHALMOLOGY
Field(s)/Group(s):
Anatomy and Physiology
Keyword(s):
MYOPIA, *AMETROPIA, ASTIGMATISM
Report Date:
1971 May 01