the treatment or study of problems of the eye muscles, for example having a squint (= when the eyes look in different directions) or having double vision (= when you can see two of everything)

Orthoptics is a special field in ophthalmology. 视轴矫正是眼科学中的一个特殊领域。

As a nurse with some experience in orthoptics, being told her young son had a possible visual defect came as a surprise. 作为一名有视轴矫正经验的护士，当得知自己的小儿子可能有视力缺陷时，她感到十分惊讶。