Eye disease and Macular degeneration

Eye disease noun - Any disease of the eye.

Macular degeneration and eye disease are semantically related. In some cases you can replace phrase "Macular degeneration" with "Eye disease", this phrases are similar.

Macular degeneration noun - Eye disease caused by degeneration of the cells of the macula lutea and results in blurred vision; can cause blindness.

Eye disease and macular degeneration are semantically related. You can use "Eye disease" instead a noun phrase "Macular degeneration".