Orbit

Question 1

What is the orbit?

Answer 1

It is a pear shaped bony cavity with the optic canal as the stalk of the pear

Question 2

What are the main conditions of orbital conditions?

Answer 2

1. Proptosis or enophthalmos(posterior displacent of the eye)
2. pain
3. decreased vision
4. diplopia

Question 3

How does a benign tumour present?

Answer 3

It is slow and painless onset of proptosis

Question 4

How does orbital cellulitis and rhabdomyosarcoma present in a child?

Answer 4

Rapid onset of proptosis in a chil

Question 5

What could a rapid onset of proptosis in an adult be?

Answer 5

orbital cellulitis and pseudotumour

Question 6

What is axial proptosis associated with?

Answer 6

Intraconal space occupying lesion like a glioma

Question 7

Non axial proptosis is associated with:

Answer 7

exraconal space occupying lesion such as a lacrimal gland tumour

Question 8

How can we measure the distance between the corneal apex and orbital margin?

Answer 8

A ruler and a hertel exophthalmometer

Question 9

When there is increased ocular retropulsion it is :

Answer 9

suggestive of a solid tumour or thyroid ophthalmopathy

Question 10

What is preseptal cellulitis?

Answer 10

Less dangerous than orbital cellulitis

It is associated from trauma or local skin infection

It does not affect eye movements and leads to peri-orbital tenderness and swelling

Treatment is outpatient antibiotics

Question 11

What is orbital cellulitis?

Answer 11

It is more dangerous than preseptal cellulitis

Affects eye movements, diplopia, blindness, redness of the eye,orbital pain

complications include blindness, meningitis, cavernous sinus thrombosis

Treated with possible surgery,IV antibiotics