In: Physics
1) What is the consequence of having denser and more spherical lenses (than human eye lenses). What are the advantages/disadvantages of this? (Hint: fish have them)
2) What is the advantage of being able to move lenses to different distances from the retina? (Hint: fish do this)
3) Many fish have a "tapetum" (a layer of reflective material just behind their retina). How does the tapetum interfere with high-resolution, crisp vision?