Station 1: 
Calculate the new lens power of a +10D moved from 12mm to 10mm 
 
Ans: * New power = +10.2D *
 

Station 2 : 

Calculate the AC/A ratio with the following figures: 15D eso distance, 5D eso with +3D for near - use gradient method
 
Ans: * AC/A = 10/3 *
 
Station 3: 

B Scan ultrasound - Name Ix & Principles. Describe findings and possible diagnosis
 
Ans: * High initial reflectivity with high echogenicity of multiple lesions at optic nerve head - Optic disc drusens *
 
Station 4: 

FFA with colour photos - Name Ix & principles. Describe findings
  
Ans: * Say what is seen in colour photo and then on FFA, there was an area of initial hypoflourescence with progressive hyperflourescence of a lesion of contant size - PED *
 
Station 5: 

Axial CT of orbit - Describe findings and possible clinical signs
 
Ans: * Intraorbital mass of high density in Left orbit, appeared well circumscribed with no bony involvement, also another lesion of high density adjacent to lateral wall possibly IOFB or bony artefact in same eye- proptosis, diplopia, EOM movement restriction, conjunctival hyperaemia etc. *
 
Station 6: 

20D lens - Name it and draw ray diagram - many drew ray diagram with BIO but essentially 20D is a convex lens hence possibly 3 types of ray diagram
 
Station 7: 

Humphreys visual field of left eye (if i remember) SITA Fast - Name Ix and describe findings
              - Was the test reliably performed 
              - where is the lesion
 
Ans: * Inferior altitudinal VF defect, describe parameters for reliability, superior retina or superior optic nerve loss *
 
Station 8: 

Hess chart - Name it and describe principles
               - Describe findings
 
Ans: * Underaction of depressors Left eye - mechanical picture *
 
 
OSCE
 
Station 1   
Direct: look at both fundi and describe findings and talk through different apparatus/functions of the direct ophthalmoscope * looked like mild RP *
 
Indirect Ophthalmolscopy: look at both fundi and describe findings and name advantages of BIO and diffence between 20D and 28D * looked like unilateral chorioretinal atrophy 270 degrees with no macula involvement, possibly secondary to cryotherapy *
 
Station 2
Bausch & Lomb (Von Helmholtz keratometer): Name instrument and describe findings (unfortunately I never used before which I told examiners but explained I knew principles, attempted to get rings into focus but I found it impossible,therefore no readings given) So was then asked to describe what Javal Shiotz readings were like and asked about 'with the rule' astigmatism. Was not asked about principles of keratometer
 
Focimetry: Bifocals - both lenses, Asked to describe principles of focimetry
 
Station 3
Ant Segments: Describe findings of left eye- Acne Rosacea, Ant. Blephritis, inferior corneal scarring with new vessels, superior limbal scar post ECCE with retained suture material, ACIOL,  dysmorphic pupil which was reactive, no post. capsule evident but vitreous strands evident, 2 x peripheral iridectomies.Asked to describe and show different types of illumination
 
Visual fields: Asked to perform confrontational VF - bilateral constricted VF with possible unilateral Left superotemporal quadrantinopia. Had to use white pins for both eyes, stopped before getting to red pins and was asked diff. diagnoses (advance glaucoma, PRP, RP), then asked uses of red pins and where the lesions are possibly when isolating with red pins
 
Station 4 
Pupils: Left RAPD. Asked why perform accommodation. Possible sites of lesion causing RAPD. Asked if possible to check for RAPD in a dilated pupil.
 
Ocular motility: Bil. proptosis secondary to TED. Asked to perform Cover test and then EOM. Asked if patient will c/o blurred vision on upgaze. The trick for this dreaded station is to describe everything seen while performing the test and obviously try to tie everything in for a diff. diagnosis while doing so. Remember stay calm and take your time, don't rush.
 
Overall the examiners were very nice but some were poker faced, not indicating how well I did. Anyway, I felt it went well after the exam
 
Refraction
38 y/o gentleman (who was actually showing how the buttons worked for the snellen chart...horror of horrors when I first met him before knowing he was an optician from the hospital) Specifically asked to write down retinoscopy results before checking VA (!!!) Luckily got him 6/6+1 BE objectively and subjectively 6/4 BE. Performed +1D blur test and Duochrome. Then did near adds. Managed Maddox rod for horizontal and vertical. Asked to leave room 3 mins before time, was not asked any questions!
 
Ret : R  -3.25/+0.25 x 90 (6/6+1)      L -3.00 DS (6/6+1)
Sub: R  -2.75 DS (6/4)                     L - 2.50/ +0.25 x 110 (6/4)
 
No near adds required
 
Maddox rod - Orthophoric for horizontal and Right hyperphoria 0.5 prism dioptre - NOT PRESCRIBED!!