Sensory Systems

Iris

Lens

Retina

Cornea

The lens becomes more spherical

The cornea flattens

The pupil enlarges

The pupil becomes smaller

Cornea → Pupil → Lens → Retina → Rods and Cones → Optic Nerve → Brain

Pupil → Cornea → Lens → Retina → Rods and Cones → Optic Nerve → Brain

Lens → Cornea → Pupil → Retina → Rods and Cones → Optic Nerve → Brain

Rods and Cones → Cornea → Pupil → Lens → Retina → Optic Nerve → Brain

Gradual blurring of vision

Sudden loss of vision

Increased sensitivity to light

Eye pain

Old age

Diabetes

Infections

All of the above

Antibiotics

Surgical removal

Steroid eye drops

No treatment is necessary

Increased intraocular pressure

Decreased intraocular pressure

Ulcer formation on the cornea

Inflammation of the conjunctiva

1

2

3

4

Redness

Itching

Blurred vision

Dry eyes

More than 50% of the palpebral aperture is involved

The colour is yellowish

The posterior border of the h'ge is not seen

There is an associated hyphema

Dry skin

Hair loss

Red, swollen eyes

Increased appetite

Bacteria

Viruses

Allergies

All of the above

Redness of the eye

Swelling of the surrounding eye tissue

Increased intraocular pressure

Discharge from the eye

It is a minor issue that resolves on its own

It is an emergency where the retina pulls away from blood vessels

It is a common condition that affects everyone

It is a condition that only affects older adults

Spots or floaters

Blurred vision

Impaired color vision

All of the above

Mild aching

Loss of peripheral vision

Halos around light

All of the above

Partial loss of vision

Abnormality where straight lines appear wavy

Blurred vision

Loss of central vision

Age (55 and over)

Genetics—family history

Race—more common in Caucasians

Smoking

Light focuses in front of the retina

Light focuses behind the retina

Irregular curvature of the cornea

Lens loses elasticity

Lens loses elasticity

Eyeball too long

Irregular curvature of the cornea

Light focuses behind the retina

Convex lenses

Bifocals

Concave lenses

Surgical therapy