The Eye and Vision

Practice: Advanced diabetes can sometimes cause blood vessels in the retina to bleed. Where will this blood collect? (Choose all that apply.)

Practice: You wake up at 3am and need to pee. You manage to pick your way through all the junk on the floor of your dark bedroom to get to the bathroom. Which of the following was primarily providing you with vision in the very low-light environment of your bedroom at 3am?

Practice: Which of the following directly causes changes in the levels of cGMP in a photoreceptor cell?