If you find it difficult (or impossible) to perceive a clear image of objects located at a distance, but have no problem with close up objects, then:
Your eye might be too short in length
You are probably low on aqueous humour
Your pupil is probably defective
Your are probably myopic
Which of the following is not true of the lens?
It has curved surfaces
It is denser than the surrounding media
It slows light upon entry
It does the majority of the focusing
Which of the following are not found in the human retina?
Photoreceptors
Ganglion cells
Horizontal cells
Monopolar cells
Rods are:
Absent in certain forms of colour blindness
Highly sensitive to long-wavelength light
More numerous than cones
Concentrated in the fovea
Responsible for daytime vision
The "blind spot":
Is the location where ganglion cells are most densely packed
Is absent in phototopic vision
Is populated by rod photoreceptors
Cannot be observed
Is sometimes referred to as the optic disk
The optic chiasm:
Is where the first post-retinal synapses are found
Is the sight of partial decussation of ganglion cell axons
Is Y-shaped
Is where the M- and P-ganglion cell pathways diverge
