The condition of having better vision in bright than in dim light.
Origin
Early 19th century; earliest use found in Abraham Rees (1743–1825), Presbyterian minister and encyclopaedist. From day + sight, after an erroneous interpretation of hemeralopia.
Definition of day sight in US English:
day sight
nounˈdeɪ sʌɪt
rare
The condition of having better vision in bright than in dim light.
Origin
Early 19th century; earliest use found in Abraham Rees (1743–1825), Presbyterian minister and encyclopaedist. From day + sight, after an erroneous interpretation of hemeralopia.