Medical Post Graduation

Optical media of the human eyes are

ক

Lens

খ

Cornea

গ

Vitreous humor

ঘ

Optic nerve

ঙ

Iris

Refractive media of the eye are

ক

Cornea

খ

Lens

গ

Sclera

ঘ

Retina

ঙ

Optic nerve

The refractive media of the eye include

ক

Cornea

খ

Aqueous humor

গ

Lens

ঘ

Tear film

ঙ

Retina

Constituents of refractive media of the eye are

ক

Cornea

খ

Aqueous humour

গ

Lens

ঘ

Pupil

ঙ

Inner limiting membrane of the retina

The cornea

ক

Has a stratified epithelium in which the cells retain their nuclei

খ

Normally contains leucocytes

গ

Contains peripheral myelinated nerves

ঘ

Plays a part in accommodation

ঙ

Has sensory afferents running in the short cilary nerves to the ciliary ganglion

Corneal ulcer is treated with

ক

Atropin drop

খ

Antibiotic drop

গ

Steroid drop

ঘ

Pilocarpin drop

ঙ

Brimonidin drop

Regarding cornea of the eye

ক

Its epithelium has a replacement period of about 7 days

খ

Posterior surface is more curve than anterior

গ

Stroma is the thickest layer and is a cellular

ঘ

It is absolutely avascular structure

ঙ

It is a four layered structure

Following metabolic diseases cause corneal deposition:

ক

b )Wilson's disease

খ

Mucopolysaccharidosis

গ

Diabetes mellitus

ঘ

Gout

ঙ

Thyrotoxicosis

Predisposing factors in corneal ulcer

ক

Trauma

খ

Dry eye

গ

Malnutrition

ঘ

High carbohydrate diet

ঙ

Ptosis

Corneal epithelium has got the following characteristics

ক

Desmosomes only attach the cells the their neighbours

খ

Superficial cell layer possesses microvilli

গ

Uniform thickness

ঘ

Basal layer cells do not regenerate

ঙ

Nerve supply by myelinated fibers

Following glands are found in the eyelid

ক

Gland of Zeis

খ

Meibomean gland

গ

Ciliary body

ঘ

Accessory lacrimal gland

ঙ

Lacrimal gland

The ciliary ganglion

ক

Receives branches from nasociliary nerve

খ

Receives branches from 3rd cranial nerve

গ

Relay the pupillary light reflex pathway

ঘ

Is located above the eye ball

ঙ

Supply the lacrimal gland

Lacrimal gland

ক

Has two parts

খ

Secretes all components of tear fluid

গ

Is an endocrine gland

ঘ

Is situated antero-medial to the eye ball is supplied by axons of superior

ঙ

Salivatory nucleus neurons

Macula Lutea

ক

Is the area of most acute vision

খ

Accounts for one third of the visual cortex

গ

Is completely free of blood vessels

ঘ

Lies medial to the optic disc

ঙ

Contains high concentration of rods

Intraocular muscles are

ক

Sphincter pupillae

খ

Ciliaris

গ

Lateral rectus

ঘ

Superior oblique

ঙ

Orbicularis oculi

Medical Post Graduation | Eye