Title

Effect Of Flashes Of Light On Night Visual Acuity

Date

1953

Index Abstract

Coming Soon

Photo Quality

Undetermined

Report Number

WADC TR 52-10 Part 1

Creator

Fry, Glenn A.

Alpern, Mathew

Corporate Author

Ohio State University Research Foundation

Extent

10

PB Number

PB107338

NTRL Accession Number

AD013833

Identifier

AD0013833

AD Number

13833

Access Rights

Unknown

Distribution Classification

1

DTIC Record Exists

No

Distribution Change Authority Correspondence

AFAL LTR

Distribution Change Action Date

1/1/1900

Distribution Conflict

Fix

Abstract

Three subjects were used in an investigation to determine the ability of the eye to see a dark object against a sky background at night after exposure of the eye to a flash of light or a series of flashes. The discussion of the experimental setup and procedure includes a description of the fixation point, the visual-acuity measuring device, and the flash-exposure device. Theoretical considerations are presented regarding the advantages and limitations of the visual-acuity method of measuring dark adaptation. The investigation succeeded in demonstrating the operation of 3 basic principles which can be used in predicting the effect of a flash upon the subsequent ability of an eye. (1) The adaptation of any given part of the retina can be regarded as being independent of adaptive processes in other parts of the retina. (2) Reciprocity between time and intensity can be assumed to hold over a 3-sec interval. (3) The effect of a flash displaced from part of the retina which is used in viewing an object can be accounted for in terms of stray light. The amount of stray light falling at any given part of the retina can be computed from the Stiles-Holladay equation.

Report Availability

Not available via Contrails

Date Issued

1953-01

Index In

DTIC

Type

report