What is the difference between astigmatism and glare?

　　The differences between astigmatism and glare include distinct definitions and nature, different causes and mechanisms, varying symptoms, different influencing scenarios, and differing correction methods. These two conditions are separate visual issues and should be clearly differentiated through professional examination. If persistent blurred vision or increased discomfort under bright light occurs, it is recommended to seek medical attention promptly.

　　1. Different definitions and nature: Astigmatism is caused by irregularities in the eye's refractive system, preventing light from focusing into a sharp point; it belongs to refractive errors. Glare, on the other hand, refers to visual disturbances caused by intense light stimulation or light scattering, classified as an abnormality in visual perception.

　　2. Different causes and mechanisms: Astigmatism is mostly due to uneven curvature of the cornea or lens surface, with some cases related to ocular trauma or surgery. Glare is typically caused by excessive light intensity, pupil dilation, or ocular surface diseases that lead to light scattering.

　　3. Different symptoms: Astigmatism mainly manifests as double images, blurred vision, and reduced visual acuity, affecting both near and distant vision. Glare causes halos or scattered vision under bright light, with symptoms particularly noticeable at night when viewing lights.

　　4. Different affected scenarios: Astigmatism may impair vision under any lighting condition, causing continuous difficulty in daily visual tasks. Glare usually occurs in bright light, backlit environments, or during nighttime illumination, with discomfort appearing only in specific situations.

　　5. Different correction approaches: Astigmatism is primarily corrected with cylindrical lenses (glasses), contact lenses, or surgically in severe cases. Glare requires treatment targeting the underlying cause—such as avoiding bright light exposure, managing ocular surface diseases, or wearing anti-glare glasses when necessary.

　　It is important to develop healthy eye-use habits in daily life: avoid prolonged close-up work to reduce eye strain; wear sunglasses in bright outdoor environments; slow down while driving at night and avoid staring directly at lights; maintain good eye hygiene to prevent ocular surface inflammation that may trigger glare.