Military night vision goggles (NVGs) are image intensifiers normally used when the human operator's visual capabilities are unimpaired by oxygen deprivation. However, mountain search team members and aviators sometimes operate with NVG augmentation at altitudes where hypoxic visual decrement is documented. The objective of this research was to investigate the effects of mild hypoxia on monocula...

Night vision goggles are becoming an increasingly important tool in military aviation. They provide superior visual capability over unaided night vision, but any reduction in goggle performance can have a serious effect on flight safety and operational effectiveness. This study shows that the use of a standard adjustment procedure in a night vision goggle (NVG) test lane, with a resolution char...

B Confirming the diagnosis of night blindness in our patient, the scotopic response in his electroretinogram (ERG) was distinctly reduced while the photopic response was normal. When his blood was examined for a low level of vitamin A as a possible cause for night blindness, we found the value to be reduced below normal (17 pg/dl versus 25-70 pg/dl in normal subjects). Treatment with vitamin A ...

B Confirming the diagnosis of night blindness in our patient, the scotopic response in his electroretinogram (ERG) was distinctly reduced while the photopic response was normal. When his blood was examined for a low level of vitamin A as a possible cause for night blindness, we found the value to be reduced below normal (17 pg/dl versus 25-70 pg/dl in normal subjects). Treatment with vitamin A ...

Congenital stationary night-blindness associated with myopia may be transmitted by two types of inheritance: X-linked recessive (Worth, 1906; Nettleship, 1909 and 1912; Kleiner, 1923) and autosomal recessive (Nettleship, 1912; Vogt, 1923; Gassler, 1925; Akiya, 1935; Merin et al, 1970). There are only a few reports of either variety. The present paper describes a family where 3 sibs are affected...

B Confirming the diagnosis of night blindness in our patient, the scotopic response in his electroretinogram (ERG) was distinctly reduced while the photopic response was normal. When his blood was examined for a low level of vitamin A as a possible cause for night blindness, we found the value to be reduced below normal (17 pg/dl versus 25-70 pg/dl in normal subjects). Treatment with vitamin A ...

B Confirming the diagnosis of night blindness in our patient, the scotopic response in his electroretinogram (ERG) was distinctly reduced while the photopic response was normal. When his blood was examined for a low level of vitamin A as a possible cause for night blindness, we found the value to be reduced below normal (17 pg/dl versus 25-70 pg/dl in normal subjects). Treatment with vitamin A ...