b. the temporal retina is the last to become vascularized.
c. vascularization of the nasal retina is complete at 36
d. both birth weight and gestational age of the baby are
important factor in the development of retinopathy
e. unless treated retinopathy of prematurity is a
2. The following are true about vitamin A deficiency:
a. night blindness is a late sign.
3. With regard to world blindness:
b. Bitot's spots are caused by conjunctiva metaplasia.
c. Bitot's spots are found mainly on the nasal bulbar
d. sterile corneal ulceration is a feature.
e. the immune system is impaired by vitamin A deficiency.
a. the WHO (World Health Organization) definition of
blindness is vision of <3/60
b. the WHO uses a trichotomous scale (normal/low
vision/blindness) for vision
c. blindness from trachoma is caused by trichiasis
d. trachoma is the most common cause of blindness in the
e. about 17 millions in the world are blind as a result of
. 4. With regard to meta-analysis:
a. pooling can be used
b. two or more similar randomized controlled trials are
combined to increase the estimate of the direction
the strength of an intervention effect.
c. there are two method for meta-analysis
d. a better result can be obtained by combining individual
patient data from the original studies for data
e. it involves weighing individual studies against
predetermined methodlogic criteria with the results
reflecting the weighted value.
5. With regard to evidence based medicine:
a. only evidence obtained by prospective randomized
clinical trials should be used
b. it involves the application of clinical expertise and the
best available clinical evidence to give sound advice
c. it provides a blueprint for clinical decision making
d. the evidence used should be subjected to quality scale
in order to evaluate the evidence.
e. the treatment must be inexpensive