Hello Arie Prihatnanto, thanks for the question.
From your description, you can talk about a white appearance on the cornea or on the black part of the eye. Usually this is known as arcus senilis which can appear with age and is a build up of fat and cholesterol. This condition is not dangerous and therefore does not require therapy.
Hope that answers your question.
Dr Zeiras Eka Djamal, SpM
JEC @ Cinere Jalan Cinere Raya No. 19, Depok, West Java (fds / fds)