Is a 100-degree difference between the two eyes severe?

A 100-degree difference between the two eyes generally refers to a 100-degree difference in visual acuity between the left and right eyes, known as anisometropia, which is usually not severe.

Mild anisometropia typically presents no symptoms. However, in pathological cases, there can be a significant difference in uncorrected visual acuity between the two eyes, leading to binocular single vision dysfunction, impaired stereoscopic vision, and potentially causing amblyopia in one eye or exotropia. In such cases, a 100-degree difference between the eyes is considered mild. Correction with regular eyeglasses or contact lenses under medical guidance is recommended. If the refractive difference between the eyes is large enough to interfere with daily activities, work, or study, prompt medical consultation is necessary. Treatments such as intraocular lens implantation or various types of excimer laser corneal refractive surgeries may be used under a doctor's direction to alleviate symptoms.

It is advisable to avoid tilting the head while viewing close objects, maintain proper pen-holding posture, adopt correct sleeping positions, and ensure a balanced diet, all of which may help relieve symptoms.