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The Worth Four Light Test, also known as the Worth's four dot test or W4LT, is a clinical test mainly used for assessing a patient's degree of binocular vision and binocular single vision. Binocular vision involves an image being projected by each eye simultaneously into an area in space and being fused into a single image.
Claud Alley Worth FRCS (1869–1936) was a British ophthalmologist, [1] [2] inventor of the Worth 4 dot test and Worth's Ambyloscope, [2] [3] a pioneer in the orthoptic treatment of squint, [2] [4] a master mariner [2] and an established author on the subjects of ophthalmology and sailing.
During an eye examination, the presence of suppression and the size and location of the suppression scotoma may be the Worth 4 dot test (a subjective test that is considered to be the most precise suppression test), or with other subjective tests such as the Bagolini striated lens test, or with objective tests such as the 4 prism base out test.
testing visual acuity Red green goggles (red - right side & green - left side) used in Worth 4 dot test, diplopia testing Prisms: to measure the degree of squints; in other instruments; refractive correction; etc. Placido's disc: to assess the condition of the corneal surface Retinoscope
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Worth 4 dot test This page was last edited on 9 November 2022, at 20:57 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...
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