Across
- 4. The clear outer surface of the eye. The first thing light passes through
- 7. Focuses incoming light onto the retina and flips the image upside-down
- 11. The light-sensitive pigment protein found inside rod cells
- 12. What a rod cell does when light hits it — it goes quiet instead of firing
- 13. The colored ring in the eye that controls how much light enters through the pupil
- 14. Type of retinal cell whose axons bundle together to form the optic nerve
Down
- 1. The G-protein activated by rhodopsin during phototransduction
- 2. Photoreceptors concentrated in the fovea that detect color in bright light
- 3. The small central pit in the retina with the highest visual acuity
- 5. The sharpness or clarity of vision; highest at the fovea
- 6. The blank nerve carries visual signals from the retina to the brain
- 8. Molecule that keeps sodium channels open in the dark; broken down when light hits
- 9. Photoreceptors that work in dim light — about 90 million per eye, absent in the fovea
- 10. The dark opening in the iris that allows light to enter the eye
- 11. The light-sensitive layer at the back of the eye containing rods and cones