Results: At visual acuity levels of 20/60 or better, Allen figure testing averaged 1.5 lines better than Snellen letter testing; between 20!70 and 20/200 visual acuities, the difference was 2.5 …
Visual Acuity Assessment in Children - EyeWiki
Visual acuity is the ability to visualize two objects as separate or the resolving power of the eye. It is defined as the smallest object that can be recognized at a particular distance. Visual acuity …
Modified Allen pictures to assess amblyopia in young children
To produce a test of visual acuity for young children that is more sensitive to amblyopia than current preschool vision tests, the authors surrounded four Allen pictures with "crowding" bars. …
Comparison of Visual Acuity Measured with Allen Figures and …
1997年11月1日 · Results: At visual acuity levels of 20/60 or better, Allen figure testing averaged 1.5 lines better than Snellen letter testing; between 20/70 and 20/200 visual acuities, the …
Comparison of visual acuity measured with Allen figures and …
Results: At visual acuity levels of 20/60 or better, Allen figure testing averaged 1.5 lines better than Snellen letter testing; between 20/70 and 20/200 visual acuities, the difference was 2.5 …
Comparison of visual acuity levels in pediatric patients with
The results of the current study suggest that Wright figures© are more accurate than isolated Allen optotypes in determining the visual acuity in pediatric amblyopic patients and could be …
Modified Allen Pictures to Assess Amblyopia in Young Children
To produce a test of visual acuity for young children that is more sensitive to amblyopia than current preschool vision tests, the authors surrounded four Allen pictures with “crowding” bars. …
The most commonly measured type of visual acuity, recognition visual acuity, is defined as the ability to identify certain optotypes (letters, numbers, or figures) at a specified distance. …
Comparison of Visual Acuity Measured with Allen Figures and …
1997年11月1日 · Results: At visual acuity levels of 20/60 or better, Allen figure testing averaged 1.5 lines better than Snellen letter testing; between 20/70 and 20/200 visual acuities, the …
Handheld Allen picture optotypes are commercially available on printed cards from several sources; they are also incorporated into several screen-based visual acuity testing systems …