Associated conditions such as angioid streaks and retinitis pigmentosa should be screened for.
2.
In 1889, he was the first physician to describe angioid streaks, a disorder that affects Bruch's membrane.
3.
His name is lent to the eponymous " Knapp streaks "; also known as angioid streaks, which are tiny breaks in the elastin-filled physiological optics to demonstrate the action of ocular muscles individually or in various combinations.