Day blindness and Visual impairment

Day blindness noun - Inability to see clearly in bright light.

Visual impairment and day blindness are semantically related. In some cases you can use "Visual impairment" instead a noun phrase "Day blindness".

Visual impairment noun - Impairment of the sense of sight.

Day blindness and visual impairment are semantically related. Sometimes you can replace phrase "Day blindness" with "Visual impairment", this phrases are similar.