Question
The child has myopia of 225 degrees. Discuss the time and cause of onset, school health checks, past treatment and effectiveness, which were not paid attention to. It is necessary to specifically discuss the etiology and comprehensive prevention and treatment of this disease.
Answer
Normal eyes with good vision can fully enjoy and respond to the rich colors of nature. However, some children may appear normal on the outside but have color vision impairments. Clinical diagnosis of color vision impairments mainly falls into two categories: one is low color discrimination ability, medically referred to as color weakness; the other is complete inability to distinguish colors, known as color blindness. According to the trichromatic theory, any color can be composed of combinations of red, green, and blue.