This 10 year old boy was first noted to have reduced acuity during a routine doctor visit at age 5. This child's head circumference 52.5 cm which is approximately 13th percentile for his age.
| Age at visit: 10 years |
| Age at visit: 10 years (Visit 2) |
| Age at visit: 12 years |
| Age at visit: 13 years |
| Age at visit: 15 years |
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