These prevent objects being seen clearly, because the beams of light do not meet on the retina.
There are three: hypermetropia, myopia and stigmatism
It is important to detect them early since they may cause poor performance at school.
When should you take a child to visit an ophthalmologist?
When the child has any clear anomaly or ocular discomfort:
- Misalignment of the eyes.
- Differences in vision when covering either eye.
- Being too near the television or to paper when reading or writing.
- Headache after straining the vision.
- Half closing the eyes when looking at distant objects.
- Frequent blinking.
- Stiff neck (after adopting abnormal positions of the head; when watching television for example).
- White or greyish pupils (leukocoria).
- Frequent red or stinging eyes.
- Blepharoptosis (drooping upper eyelid).
- Nystagmus (involuntary fluctuating ocular movements).