Vanishing optotypes: is single presentation superior to chart exposure ?
Braz. j. med. biol. res
;
24(2): 145-8, 1991. tab
Article
in English
| LILACS
| ID: lil-99448
ABSTRACT
A study comparing single optotype presentation vs entire chart exposure (with spacings of either 1.5 or 3.0 times the optotype width) was conducted on 46 subjects divided into two groups in order to evaluated how the mode of presentation affects visual acuity measurements made with mediaum-pass filtered vanishing optotypes. There were no significant differences in either group between the two modes of presentation. However, in the individual cases in which a decrease in percent correct responses greater than 20% was observed in either mode of presentation, there was a slight tendency towards superiority of the entire chart exposure mode
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Index:
LILACS (Americas)
Main subject:
Visual Acuity
/
Vision Screening
Limits:
Adolescent
/
Humans
Language:
English
Journal:
Braz. j. med. biol. res
Journal subject:
Biology
/
Medicine
Year:
1991
Type:
Article
/
Congress and conference
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