Question

How do children get strabismus?
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Answer 1

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A small number of children will get strabismus -- eyes that don’t line up like they should. Infantile esotropia is a type that affects premature babies.

When the muscles that surround and control the eye don't work together, your child’s eyes will point in different directions.

Doctors think it happens to preemies because the baby's brain hasn't developed enough to control her eye muscles.

These other factors play into it as well:

• Brain or nerve problems like water on the brain, bleeding in the brain, seizure disorders, cerebral palsy, and other conditions

• Retinal damage from ROP

• A buildup of blood vessels under the skin (the doctor will all this a hemangioma) near the eye

• Brain or eye tumors

• A cataract or eye injury

• Developmental delay

• Genetic disorders

Answer 2

Distance in one hour = 1 km

Distance in second hour = 0.5 km

Distance in third hour = 0.3 km

We know that,

Average speed = total distance /total time

i) Average speed in km/hr

ν = D/T

= 0.6km/hr

ii) Average speed in m/s

ν = 0.6* 5/8

= 0.167m/s

The average velocity is 0.6 km/hr and 0.167 m/s.