night blindness

American  

noun

Ophthalmology.

1. a condition of the eyes in which vision is normal in daylight but abnormally poor at night or in a dim light; nyctalopia.

---

night blindness British  

noun

1. pathol a nontechnical term for nyctalopia

---

Other Word Forms

• nightblind adjective

Etymology

Origin of night blindness

First recorded in 1745–55

Example Sentences

In most circumstances, rods are very sensitive to light, but in people with night blindness, the rods cannot accurately detect changes in light, and fail to function in the dark.

From Science Daily

Ironically, the genetic alteration is surprisingly similar to one that degrades pigments in human retinas, causing night blindness.

From Science Magazine

He is afflicted by night blindness, a possible consequence of his own malnutrition early in life.

From Scientific American

“I don’t drive anymore. I’m 61 and I get night blindness,” Chostler said before reflecting on the importance of having a transit stop nearby.

From Washington Times

The actress, who suffers from night blindness, still refused and says she was told the building's front doors were locked and was sent in the direction of a dark stairwell.

From BBC