As a parent, you may wonder whether your pre-schooler has a vision problem or when a first eye exam should be scheduled.
Eye exams for children are extremely important. Experts say 5% to 10% of pre-schoolers and 25% of school-aged children have vision problems. Early identification of a child's vision problem is crucial because, if left untreated, some childhood vision problems can cause permanent vision loss.
According to the American Optometric Association (AOA), infants should have their first comprehensive eye exam at 6 months of age. Children then should receive additional eye exams at 3 years of age, and just before they enter kindergarten or the first grade at about age 5 or 6.
For school-aged children, the AOA recommends an eye exam every two years if no vision correction is required. Children who need eyeglasses or contact lenses should be examined annually or according to their eye doctor's recommendations.
Early eye exams also are important because children need the following basic visual skills for learning:
Near vision
Distance vision
Eye teaming (binocularity) skills
Eye movement skills
Focusing skills
Peripheral awareness
Eye/hand coordination
Tests of pupil responses evaluate whether the eye's pupil opens and closes properly in the presence or absence of light.
"Fixate and follow" testing determines whether your baby can fixate on an object (such as a light) and follow it as it moves. Infants should be able to perform this task quite well by the time they are 3 months old.
Preferential looking involves using cards that are blank on one side with stripes on the other side to attract the gaze of an infant to the stripes. In this way, vision capabilities can be assessed.
LEA symbols for young children are similar to regular eye tests using charts with letters, except that special symbols in these tests include an apple, house, square and circle.
Retinoscopy is a test that involves shining a light into the eye to observe how it reflects from the retina (the light-sensitive inner lining of the back of the eye). This test helps eye doctors determine the child's eyeglass prescription.
Random dot stereopsis uses dot patterns to determine how well the two eyes work as a team.
Strabismus. This is misalignment of the eyes, often caused by a congenital defect in the positioning or strength of muscles that are attached to the eye and control eye positioning and movement. Left untreated, strabismus can cause amblyopia in the misaligned eye. Depending on its cause and severity, surgery may be required to treat strabismus.
Convergence insufficiency. This is the inability to keep the eye comfortably aligned for reading and other near tasks. Convergence insufficiency can often be treated successfully with vision therapy, a specific program of eye exercises.
Focusing problems. Children with focusing problems (also called accommodation problems) may have trouble changing focus from distance to near and back again (accommodative infacility) or have problems maintaining adequate focus for reading (accommodative insufficiency). These problems often can be successfully treated with vision therapy.
Eye teaming problems. Many eye teaming (binocularity) problems are more subtle than strabismus. Deficiencies in eye teaming skills can cause problems with depth perception and coordination.
Experts say that 80% of what your child learns in school is presented visually. Undetected vision problems can put them at a significant disadvantage. Be sure to schedule a complete eye exam for your child prior to the start of school.