AI Article Synopsis
- Deaf signers exhibit a larger Visual Field (VF), particularly in the lower part, possibly due to early deafness or frequent sign language use.
- The study aimed to investigate if hearing users of sign language have enhanced VF sensitivity, especially in the lower VF, compared to hearing non-signers.
- Results showed that hearing signers had higher luminance sensitivity in the lower VF (3 to 15°) where sign language gestures are perceived, suggesting that sign language experience can influence VF sensitivity independently of deafness.
Article Abstract
Studies have observed that deaf signers have a larger Visual Field (VF) than hearing non-signers with a particular large extension in the lower part of the VF. This increment could stem from early deafness or from the extensive use of sign language, since the lower VF is critical to perceive and understand linguistics gestures in sign language communication. The aim of the present study was to explore the potential impact of sign language experience without deafness on the VF sensitivity within its lower part. Using standard Humphrey Visual Field Analyzer, we compared luminance sensitivity in the fovea and between 3 and 27 degrees of visual eccentricity for the upper and lower VF, between hearing users of French Sign Language and age-matched hearing non-signers. The sensitivity in the fovea and in the upper VF were similar in both groups. Hearing signers had, however, higher luminance sensitivity than non-signers in the lower VF but only between 3 and 15°, the visual location for sign language perception. Sign language experience, no associated with deafness, may then be a modulating factor of VF sensitivity but restricted to the very specific location where signs are perceived.
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| http://dx.doi.org/10.1016/j.visres.2018.08.003 | DOI Listing |
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