Astigmatism in three-year-old children, accompanied by frequent rubbing of the eyes may be caused by astigmatism, but also may be caused by conjunctivitis, inverted eyelashes and other diseases. 1. Astigmatism: Astigmatism is caused by congenital factors or corneal diseases and other factors, the main symptoms of the child are blurred vision, vision loss, vision fatigue and so on. Children with astigmatism have blurred vision and will rub their eyes to increase clarity. 2. Conjunctivitis: Conjunctivitis has many causes, mainly related to bacterial, viral and other pathogenic infections and other factors. The main symptoms are redness, dryness and itchiness of the eyes. Conjunctivitis in children with astigmatism can also lead to eye rubbing. 3. Inverted eyelashes: Inverted eyelashes are associated with a variety of factors, mainly the lower eyelid superfluous skin and other factors. Children may experience tearing, photophobia, and eye pain. If the child suffers from a combination of inverted eyelashes, it can also lead to frequent rubbing of the eyes. Three-year-old children with astigmatism, but also have to I accompanied by frequent eye rubbing, parents should take their children to the doctor in a timely manner, and follow the doctor’s instructions for treatment.