ࡱ> 5@ 6bjbj22 $dXX.f$f$f$f$T$\"%"%"%"%"%"%"%"%')))-Vfv$Rn&"%"%&&"%"%,,,&R"%"%',&',,3.h"%% ) f$;*''Ţ0k+k$k"%Z|%@,%4%"%"%"%b , b FELLOWSHIP EXAMINATION JUNE/JULY 2003 VETERINARY OPHTHALMOLOGY PAPER 1 BASIC SCIENCE Perusal Time : 20 minutes Time Allowed : THREE (3) Hours after perusal ANSWER FIVE (5) out of Six Questions Only ALL QUESTIONS ARE OF EQUAL VALUE Subsection of Questions are of equal value unless stated otherwise Compare and contrast current concepts in the aetiopathogenesis of hereditary retinal degenerations reported in the dog. Include the currently accepted nomenclature, biochemical and/or ultrastructural abnormalities (where known), mode of inheritance and breed(s) affected for each condition. Discuss the modes of action and indications for the various T lymphocyte modulating drugs used in veterinary ophthalmic therapeutics. Describe the biochemical and electrophysiological events of phototransduction. Correlate these events with a typical flash Electroretinogram (ERG) recording. Describe the differentiation of rod and cone photoreceptor function using differing ERG protocols and give examples of conditions where you would use this. You are presented with a puppy that has a 4 mm penetrating tear in the cornea caused by a cat claw injury. Describe, in detail, the immediate changes that occur in the cornea and within the eye and follow this with a description of the changes that occur in the cornea as it heals. Compare and contrast the vision of dogs and birds and discuss how variations in structure and function of the eye and orbit account for any differences. Describe in detail the normal afferent and efferent nerve pathways and the neural control of pupil function in dogs. Discuss the signs that you would expect to see clinically with afferent and efferent nerve pathway defects. END OF PAPER FELLOWSHIP EXAMINATION JUNE/JULY 2003 VETERINARY OPHTHALMOLOGY PAPER 2 PART 1 APPLIED Perusal Time : 20 minutes Time Allowed : THREE (3) Hours after perusal ANSWER FIVE (5) out of Six Questions Only ALL QUESTIONS ARE OF EQUAL VALUE Subsection of Questions are of equal value unless stated Describe the autogeneic, allogeneic and xenogeneic corneal grafting techniques used in domestic mammals, commenting on the specific indications, contraindications, advantages and disadvantages for each technique. Describe the ocular manifestations and diagnostic tests available for systemic infectious diseases recorded in Australia which can affect the canine, feline or equine eye. Discuss the indications, contraindications and potential complications of the various reported protocols for treatment of canine and feline glaucoma using the cyclodestructive techniques of cyclocryothermy and laser cyclophotocoagulation. In cats infected with Feline Herpes virus I (FHV-1): a. Describe all the ocular signs that have been attributed to this disease. b. List the diagnostic tests that have been reported and briefly discuss their sensitivity and specificity. Discuss equine keratomycosis. Include in your answer the most common aetiological agents, clinical signs, differential diagnosis, diagnosis, treatment options, prognosis and possible sequelae. Discuss the typical clinical behaviour, treatment and prognosis of primary and secondary uveal neoplasms that have been reported in the dog. END OF PAPER FELLOWSHIP EXAMINATION JUNE/JULY 2003 VETERINARY OPHTHALMOLOGY PAPER 2 PART 2 - COMPARATIVE Perusal Time : 20 minutes Time Allowed : TWO AND HALF HOURS (2) after perusal ANSWER ALL 35 QUESTIONS ALL QUESTIONS ARE OF EQUAL VALUE Name the structure that supplements choroidal nutrition to the retina in the following species: a. Birds b. Lizards c. Teleost fishes Name the retinal vascular pattern present in the following species: a. Rodents b. Hares c. Elephants d. Bats List the bones which make up the orbit in the dog. List the orbital foramina and their associated nerves in the horse. What is Cloquets canal? In recent years there has been an epidemic of blindness in Kangaroos. a. Name the aetiological agent responsible. b. Briefly describe the ocular pathology causing the blindness. a. Name the parasite that can infect the lens in fishes. b. What ocular pathology does Vitamin A deficiency cause in chelonians? In a study using Kestrels, three curarelike neuromuscular blocking agents were tested for use as a mydriatic. a. Name the drugs. b. Name the drug which was most effective and recommended for use as a mydriatic in birds. Continued over/Ophthalmology/Paper 2 Comparative/2003 Continued/Ophthalmology/Paper 2 Comparative/2003 Vit A deficiency in calves can cause blindness. a. What ophthalmic sign can be seen on ocular examination? b. What is the mechanism that causes the signs and eventual blindness? In a comparison of tear protein concentration between llamas and cattle: a. Was the tear protein concentration similar in both species, higher in llamas or higher in cattle? b. Was the tear pH similar in both species, higher in llamas or higher in cattle? With reference to a study of normal intraocular pressure in dairy cattle: a. What was the mean intraocular pressure? b. What was the range of intraocular pressure? Name FOUR (4) ocular abnormalities found in Rocky Mountain Horses. List FOUR (4) rheologic properties of viscoelastic materials used in the eye. What is chromodacryorrhoea and what is its cause? List FOUR (4) infectious agents that may cause keratoconjunctivitis in pigs. At what day post-fertilisation (choose from 17, 30, 32, 51) do the following developmental events occur in the canine eye? a. Retinal vessels present b. Tunica vasculosa lentis present c. Optic vesicle contacts surface ectoderm d. Anterior chamber beginning to from With respect to Snellen chart fractions used for visual acuity estimates in humans: a. What do the terms 20/20 and 6/6 mean? b. What do the terms 20/40 and 6/12 mean? c. What visual acuities do the bottom and second bottom lines of a Snellen chart equate to when these can be read? d. What is the estimated visual acuity of dogs? With respect to mean palpebral fissure length, which of the four values 27.8 ( 2.7mm, 32.7 ( 4.2mm, 34.6 ( 3.1mm and 39.0 ( 3.9mm applies to: a. All dogs? b. Dogs with entropion? c. Dogs with lack of contact between lid margins and globe? d. All cats? Continued over/Ophthalmology/Paper 2 Comparative/2003 Continued/Ophthalmology/Paper 2 Comparative/2003 In a recent retrospective study on the causes of uveitis in 102 dogs a. What was the most commonly associated organism? b. What was the most commonly associated neoplasm? c. What approximate percentage of dogs with uveitis (choose from 60%, 65%, 70%, 75%) failed to have an underlying cause identified leading to a diagnosis of immune-mediated or idiopathic uveitis? d. What approximate percentage of dogs with uveitis (choose from 10%, 15%, 20%, 25%) had ocular and/or systemic neoplasia? In a recent study of Leptospira interrogans in horses with recurrent uveitis: a. What percentage of eyes (choose from 0, 15, 30, 50 %) from horses with recurrent uveitis had L.interrogans isolated from the vitreous? b. What percentage of eyes (choose from 0, 15, 30, 50 %) from control horses had L.interrogans isolated from the vitreous? c. What was the mean L.interrogans antibody titre (choose from Negative, 1:64, 1:186, 1:1332) in the vitreous from horses with recurrent uveitis? d. What was the mean L.interrogans antibody titre (choose from Negative, 1:64, 1:186, 1:1332) in the serum from horses with recurrent uveitis? List FOUR (4) lesions reported in horses involving the eye or ocular adnexa associated with lymphosarcoma. In a retrospective study of 200 dogs with diabetes mellitus, what percentage (choose from 0%, 25%, 50%, 65%, 75%, 80%, 100%) of dogs was found to have developed cataracts within: a. 60 days of diagnosis? b. 170 days of diagnosis? c. 370 days of diagnosis? d. 470 days of diagnosis? The microorganism Encephalitozoan cuniculi, which can trigger lens capsule rupture and phacoclastic uveitis in rabbits, is: a. Transmitted from rabbit to rabbit in what way? b. Thought to invade the lens at what age? List FOUR (4) canine breeds in which hereditary retinal dysplasia has been reported. For each breed state the type(s) of retinal dysplasia recorded, any other associated abnormalities (ocular and/or non-ocular) and the mode of inheritance (if known). Continued over/Ophthalmology/Paper 2 Comparative/2003 Continued/Ophthalmology/Paper 2 Comparative/2003 With respect to the current DNA-based tests for hereditary retinal disease in dogs: What is the name of the group of tests available for detection of the diseases including amongst others: Rod cone dysplasia type 1 in Irish Setters, Progressive retinal atrophy in Cardigan Welsh Corgis, Congenital stationary night blindness/Retinal dystrophy in Briards, Type A progressive retinal atrophy in Miniature Schnauzers, X-linked progressive retinal atrophy in Siberian Huskies and Samoyeds? What is the name of the group of tests available for detection of the diseases including amongst others: Progressive rod cone degeneration in Miniature and Toy Poodles, American and English Cocker Spaniels, Labrador and Chesapeake Bay Retrievers and Portuguese Water Dogs? Which of the above two test groups that is 100% accurate and 100% specific for identifying animals with the relevant gene mutation? How can the other test group be used by breeders to not produce any dogs that will develop hereditary retinal disease? List the signs of Horners syndrome in horses which are: a. Usually present. b. Usually not apparent. The drug cyclosporin: Inhibits the actions of what type of T-lymphocyte? Increases tear production in what way besides its immunomodulating effect? When used topically, increases tear production in approximately what percentage of dogs (choose from 30, 40, 50, 60 %) with immune-mediated keratoconjunctivitis sicca and initial Schirmer tear test values of 0-1mm? When used topically, increases tear production in approximately what percentage of dogs (choose from 60, 70, 80, 90 %) with immune-mediated keratoconjunctivitis sicca and initial Schirmer tear test values of greater than 2mm? List FOUR (4) surgical procedures that can be used to permanently treat distichiasis with what you consider to be the major advantage and disadvantage of each. List FOUR (4) types of laser and the ophthalmic surgical procedure(s) for which they have been used, as recorded in the current veterinary literature. In ophthalmic refractive surgery, what does the abbreviation PRK stand for? Briefly outline the principle and technique for this procedure. In ophthalmic refractive surgery, what does the abbreviation LASIK stand for? Briefly outline the principle and technique for this procedure. Continued over/Ophthalmology/Paper 2 Comparative/2003 Continued/Ophthalmology/Paper 2 Comparative/2003 List FOUR (4) classes of topical anti-glaucoma agents currently available in Australia. Give one example of each (generic and trade names) and briefly outline mode of action. In a recent study of the effects of cyclophotocoagulation with a Neodymium:yttrium,aluminum,garnet (Nd:YAG) laser on corneal sensitivity, intraocular pressure, aqueous tear production and corneal nerve morphology in eyes of dogs: What was the effect on corneal touch threshold on laser treated eyes versus controls? What was a common corneal complication in the fourteen days following laser treatment? What was the effect on corneal nerve bundle numbers and diameters? What was the effect on Schirmer tear test values? Outline the current standard corneal/corneoscleral incision technique and closure technique in human cataract surgery. List FOUR (4) types of radioactive therapy and the veterinary ophthalmic disease(s) which they have been used to treat as recorded in the current literature. 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