eye pathology Flashcards Preview

MD4001 Pathology > eye pathology > Flashcards

Flashcards in eye pathology Deck (14):
1

what is the red reflex

the reddish orange reflection of light from the retina that is observed when using an opthalmospcope

2

what are the signs and symptoms of diabetic retinopathy

macular edema
blurred vision
vision may change throughout the day
may be symptomless, despite abnormal appearance of the retina
microaneurysms
. Narrowing or blocked retinal blood vessels
neovascularisation
vitreous hemorrhage
cotton wool spots, flame hemorrhages
dot-blot hemorrhages

3

what is retinopathy of prematurity

occurs in premature babies
abnormal blood vessels grow in the retina
the retina can detatch from the back of the eye
scarred retina
lack of blood supply
must be screened for - ischaemic tissue is removed

4

what are cataracts

clouding of the lens

5

what is age related macular degeneration

loss of central vision

6

what is wet macular degeneration

caused by abnormal blood vessels
can be treated with anti vascular endothelial growth factor
more serious and can occur more suddenly

7

what is dry macular degeneration

build up of deposits in the eye
occurs more gradually
difficult to treat

8

what is the corneal reflex

light bouncing of the cornea (white) should be symmetrical

9

what causes an abnormal red reflex

anything obstructing the pathway of light from the front to the back of the eye

corneal scar (white, trauma)

cataract

vitreous haemorrhage

retinoblastoma (child)

10

what is the significance of retinoblastoma to oncogenitics

2 hit hypothesis
familial vs sporadic disease

familial is usually bilateral and presents earlier

autosomal dominant

11

what is ocular albinism

not enough pigment
glare, impaired vision

12

Lebers hereditary optic neuropathy

mitochondrial disease
loss of vision due to lack of ATP

13

describe babies vision

poor, black and white, 2d but very good at recognising faces

will develop as they get older as long as they don't have eye problems e.g. cataracts

14

what period of gestation is most critical to brain development

last 3 months

problem for premmies
too much sensory stimuli