Week 2- Conditions of the Uvea

Question 2

What are the three main parts of the uvea

Answer 2

Iris ciliary body and choroid

Question 3

What is the collarette in the iris

Answer 3

The transition zone between the central pupillary and peripheral ciliary zones

Question 4

What are persistent pupillary membranes PPMs

Answer 4

Incomplete regression of embryonal tissue spanning across the pupil

Question 5

What can iris to lens PPMs cause

Answer 5

Capsular cataracts

Question 6

What can iris to cornea PPMs cause

Answer 6

Adherent leukoma

Question 7

What is subalbinism in dogs

Answer 7

Absence of melanin from anterior stroma resulting in blue irises

Question 8

What is merle ocular dysgenesis

Answer 8

Genetic disorder in merle breeds causing multiple ocular abnormalities

Question 9

Name two findings in merle ocular dysgenesis

Answer 9

Microphthalmos retinal detachment

Question 10

What is polycoria

Answer 10

Presence of more than one pupil

Question 11

What is a coloboma

Answer 11

Congenital defect resulting in missing tissue in the iris or choroid

Question 12

What is a common location for iris hypoplasia

Answer 12

Dorsal iris especially in heterochromic eyes

Question 13

Are single iris to iris PPM bands clinically significant

Answer 13

No

Question 14

What is benign iris hyperpigmentation called

Answer 14

Freckles or nevi

Question 15

What features suggest malignant iris pigment lesions

Answer 15

Raised lesion vascular distortion flare secondary glaucoma

Question 16

What is ocular melanosis

Answer 16

Accumulation of pigment in uveal tissue potentially leading to glaucoma

Question 17

Which breed is commonly affected by ocular melanosis

Answer 17

Cairn Terrier

Question 18

How can ocular melanosis affect vision

Answer 18

Pigment blocks aqueous drainage leading to glaucoma

Question 19

What is the most common primary intraocular neoplasm in dogs

Answer 19

Melanocytoma or melanoma

Question 20

Where do most uveal tumours arise from

Answer 20

Iris or ciliary body

Question 21

What is a key feature of intraocular melanoma in cats

Answer 21

High metastatic rate

Question 22

What is a common presentation of feline intraocular melanoma

Answer 22

Diffuse pigmented thickening of the iris in older cats

Question 23

What is the metastatic rate of feline diffuse iris melanoma

Answer 23

Around 63 percent

Question 24

Are melanomas in dogs usually benign or malignant

Answer 24

Usually benign but locally invasive

Question 25

What is the second most common intraocular tumour in dogs

Answer 25

Iridociliary adenoma or adenocarcinoma

Question 26

What colour are adenocarcinomas typically

Answer 26

Pink

Question 27

What can large uveal tumours result in

Answer 27

Secondary glaucoma uveitis vitreal haemorrhage

Question 28

What are common secondary intraocular tumours

Answer 28

Lymphoma haemangiosarcoma metastatic carcinomas

Question 29

How is intraocular neoplasia diagnosed

Answer 29

Ophthalmic and systemic examination including ultrasound cytology or biopsy

Question 30

What is the preferred treatment for large or invasive intraocular tumours

Answer 30

Enucleation

Question 31

What should always be done after enucleation

Answer 31

Submit the globe for histopathology

Question 32

What are uveal cysts

Answer 32

Clear or pigmented fluid-filled remnants of optic vesicle

Question 33

How can uveal cysts be differentiated from tumours

Answer 33

Ultrasound and transillumination

Question 34

What breed is predisposed to uveal cysts associated with glaucoma

Answer 34

Golden Retriever

Question 35

What is hyphaema

Answer 35

Presence of blood in the anterior chamber

Question 36

Name three causes of hyphaema

Answer 36

Trauma clotting disorders systemic hypertension

Question 37

What are three complications of hyphaema

Answer 37

Glaucoma synechiae phthisis bulbi

Question 38

How is hyphaema treated

Answer 38

Cage rest corticosteroids mydriatics monitor IOP

Question 39

What is anterior uveitis

Answer 39

Inflammation of the iris and ciliary body

Question 40

What is panuveitis

Answer 40

Inflammation of all parts of the uvea

Question 41

What are common infectious causes of uveitis in cats

Answer 41

FIV FeLV FIP Toxoplasma

Question 42

What is phacolytic uveitis

Answer 42

Low grade uveitis due to slow leakage of lens proteins

Question 43

What is phacoclastic uveitis

Answer 43

Severe uveitis due to traumatic rupture of lens capsule

Question 44

What is aqueous flare

Answer 44

Protein leakage into aqueous humour seen as Tyndall effect

Question 45

What is hypopyon

Answer 45

Pus accumulation in the anterior chamber

Question 46

What are keratitic precipitates

Answer 46

Inflammatory cell deposits on the corneal endothelium

Question 47

What is miosis in uveitis caused by

Answer 47

Prostaglandins and ciliary muscle spasm

Question 48

What is a common cause of hypotony in uveitis

Answer 48

Reduced aqueous production due to ciliary body inflammation

Question 49

What drug is contraindicated in glaucoma but used for uveitis pain

Answer 49

Atropine

Question 50

Which topical corticosteroid is used frequently in uveitis

Answer 50

Dexamethasone

Question 51

Which systemic NSAID is commonly used in chronic uveitis

Answer 51

Aspirin