Development of the eye -
The eye starts developing 2-3 weeks after conception.
That is
before the pregnancy is diagnosed!
It starts out as an extension of the brain, therefore many ocular tissues are
derived from the nerve tissues. While some of them are derived from the
ectodermal or outermost layer of the developing embryo. By the time the baby is
born, the formation is complete but development and maturation continues.
Age
|
Visual Acuity
|
Full term New-born
|
Upto 6 feet
|
Pupils respond to light
|
4-6 weeks old
|
Visual field
30% of adult.
|
Fix and follow large objects/light
|
3 months
|
Visual ability improves rapidly
|
Wide range of follow, responds to mom's face.
|
Upto 1 year
|
20/200
|
|
3 years
|
6/6 or 20/20
|
Normal adult vision
|
The exact meaning of certain terms:
Congenital
means
present since birth.
Genetic means determined by the genes.
Hereditary means inherited due to typical genetic makeup of parents and family.
Developmental
means develops later in life.
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