1. The following histological feature are present in lattice degeneration: 

a. overlying liquefied vitreous

b. atrophy of the outer layer of the retina

c. adherence of vitreous to the margin of the lesion

d. closure of the retinal vessels

e. discontinuity of the inner limiting membrane
 

Answera.T  b.T   c.T   d.F  e.T
The retinal vessels are sclerotic but patent.

2. The following conditions are related to sun exposure: 

a. Bowen's disease

b. actinic keratosis

c. seborrheic keratosis

d. sebaceous cell carcinoma

e. syringoma

Answera.T   b.T   c.F   d.F   e.F
Seborrheic keratosis is not related to sun exposure.
Sebaceous cell carcinoma is commonest in the elderly, in young patients may be associated with radiotherapy.
Syringoma is a benign tumour of the sweat gland and is not related to sun damage.

3. In malignant lymphoma of the orbit: 

a. Hodgkin's disease is the most common

b. most common cell type is B cell lymphoma

c. follicular pattern is commonly seen

d. MALT (mucosa-associated lymphoid tissue ) lymphoma
    is a low-grade lymphoma

e. the tumour is resistant to radiotherapy

Answera.F   b.T   c.F   d.T   e.F
Non-Hodgkin's lymphoma is the most common.
Follicular pattern is seen in 15% of cases. 
Radiotherapy is the treatment of choice as the tumour is sensitive to radiation.

4. The following are true about dermoids: 

a. they are most commonly found in the superotemporal region
    of the orbit

b. they are lined by columnar epithelium

c. rupture causes granulomatous reaction with foreign body
    giant cell formation.

d. the wall contains adnexal structures.

e. they are caused by trauma in the majority of the cases

Answera.T   b.F   c.T   d.T   e.F
Dermoids are lined by keratinized stratified squamous epithelium. They are mainly congenital.

a

5. In ocular trauma:

a. cyclodialysis results from disinsertion of the ciliary body

b. angle recession results from a tear in the ciliary body

c. commotio retinae is caused by retinal oedema

d. Voss's ring is associated with progressive cataract

e. retinal dialysis is most common in the superotemporal
    region.
 

Answera.T   b.T   c.F   d.F   e.F
Commotio retinae is caused by disruption of the photoreceptors resulting in loss of retinal transparency.
Voss's ring is caused by imprint of the pigment epithelium of the iris on the anterior capsule of the lens.
Retinal dialysis is most common in the inferotemporal and the superonasal quadrant.