UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
How it Works
Ask a Question
Search Topics
Our Scientists
Science Links
Contact Information
If I put my finger on one side of my eye I can see a black spot on the other side. Why is this?
Question Date: 2006-01-13
Answer 1:

You are probably "seeing" the location in your retina that contains the optic nerve, which has no photoreceptor cells. You are blind in that spot.

Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2020 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use