Past MRCS topics April, 2003
1-Functions of the RPE: 
A-retinal attachment 
B-synthesis of Bruch's membrane 
C-scavenging free radicals 
D-formation of the photoreceptor's inner segment 
E-renewal of photoreceptors 

2-Corneal Endothelial Cells: 
A-have phagocytic properties 
B-are multi-nuclear 
C-have tight junctions between neighbouring cells 
D-have a bicarbonate pump 
E-can maintain clarity even when 50% are lost 

3-Regarding the Lens: 
A-has a high metabolic activity 
B-is the main source of lactic acid in the aqueous 
C-has a uniform thickness capsule 
D-the capsule is derived from the mesenchyme 
E-has a high sorbitol content in diabetic patients 

4-the Medial Palpebral Ligament: 
A-a part of it is attached to the maxilla 
B-is continuous with the lacrimal sac's fascia 
C-lies anterior to the angular vein 
D-interacts with fibres of orbicularis oculi 
E-is formed of the aponeurosis of LPS 

5-the following processes start to take place 
before 5 months gestation: 
A-pigmentation of iris 
B-formation of dialator pupillae 
C-formation of the lens placode 
D-opening of eyelids 
E-regression of hyaloid artery 

6-the Cilioretinal artery: 
A-is a branch of thr long posterior ciliary artery 
B-is found in 40% of people 
C-has a important role in CRAO cases 
D-forms an anastomosis between retinal and 
   choroidal circulations 
E-is affected in giant cell arteritis 

7-the following nucleus are located in the pons: 
A-IV nerve 
B-VI nerve 
C-VII nerve 
D-Edinger-Westphal nucleus 
E-both salivary nuclei 

8-nerves of the orbit: 
A-the lacrimal nerve passes above the muscle cone 
B-the nasociliary nerve passes above the cone 
C-the frontal nerve passes below the orbital roof 
   on the upper aspect of the superior rectus 
D-the abducent nerve supplies the lateral rectus on 
   it's medial aspect 
E-the frontal nerve is the largest division of the 

9-the blinking reflex: 
A-its frequency is 20/min 
B-starts with the contraction of orbicularis oculi 
C-is more infrequent in blind people 
D-is important for tear drainage 
E-absence of the corneal reflex is the first sign 
   of V nerve injury 

10-with respect to tears: 
A-the aqueous layer is 6.5 µm thick 
B-rarely contain IgA 
C-less than 10% of it is lost through evaporation 
D-have a diurnal variation in production 
E-contain urea 

11-smooth pursuit tracking movements: 
A-are voluntary in most cases 
B-have a latency of 200 msec 
C-to the right, are under control from the right 
   occipital and parietal cortex
D-are relatively faster than saccades movements 

12-with respect to pulfriche's phenomenon: 
A-is an optic illusion 
B-may be caused by cataract surgery 
C-may be associated with rubeotic glaucoma 
D-can be treated with LASIK 

13-regarding choroidal arteries: 
A-are considered "end" arteries 
B-have numerous fenesterations within the endothelium 
C-participate in forming bruch's membrane 
D-are absent at the fovea 
E-lobular ischaemia may be present in severe acute 

14-clarity of human cornea: 
A-is due to low water content 
B-is dependent on the integrity of the epithelium 
C-the epithelium and tear film help maintain clarity 
   and hydration state of the cornea 
D-is also due to uniform thickness of the cornea 
E-when no epithelium is present, regeneration is achieved by 
   proliferation of conjunctival cells at the limbus 

More MCQs