Exam 32: Vision

Of the following, the earliest event in phototransduction is

Focusing on objects at the near point involves

Most of the refractive power of the eye is due to the

“On center” bipolar cells

At rest, the refractive power of the eye is about 63 Diopters. The amount of refractive power due to the lens is about

On center ganglion cells are most active when the receptive field

The pathway for detailed information involves

The shape of the eyeball is maintained by the

Neurons in the left optic nerve carry visual information from

Cones are most highly concentrated in the

W hich of the following does NOT describe retinal rod cells?

Retinal cells that produce action potentials include

The “blind spot” in the visual field is due to light falling on the

Sympathetic stimulation of the iris causes

“Bleaching” refers to the conversion of 11 cis retinal to all trans retinal that reduces the lgiht absorption of the visual pigment and causes unresponsiveness to light. Recovery from bleaching is part of the function of

The optic nerve makes initial synaptic contact in the

Contraction of the ciliary body

The three layers of the outer eyeball include all of the following EXCEPT the

The function of the iris is to