What causes blurred vision and difficulty seeing clearly?

Blurred vision is usually caused by factors such as aging, eye strain, refractive errors, cataracts, or glaucoma. If you experience any physical discomfort, please seek medical attention promptly. Detailed explanations are as follows:

1. Aging

With advancing age, particularly in individuals over 50, the eye's ability to adjust gradually declines due to hardening of the lens, leading to blurred vision. This condition does not require special treatment and can be corrected by wearing reading glasses.

2. Eye Strain

Eye strain is typically caused by prolonged focus on close objects, reading in insufficient or overly bright lighting, or wearing improperly prescribed eyeglasses. This leads to eye fatigue and reduced accommodative function, resulting in blurred vision, often accompanied by dryness, soreness, and tearing. Follow your doctor’s advice and use medications such as naphazoline and antazoline ophthalmic solution, polyvinyl alcohol eye drops, or pearl bright eye drops for treatment.

3. Refractive Errors

Refractive errors include myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. These conditions prevent the eye from properly focusing light, causing images to appear blurry on the retina. Symptoms may also include double vision, eye fatigue, and headaches. Myopia can be corrected with concave lenses, hyperopia with convex lenses, and astigmatism with cylindrical lenses. For those who prefer not to wear glasses, refractive surgery may be an option under a doctor’s guidance.

4. Cataracts

Cataracts are a common eye condition characterized by clouding of the lens, which may be related to aging, genetics, or metabolic abnormalities. Reduced lens transparency or color changes prevent light from passing through the lens effectively, leading to blurred vision and progressive vision loss. Additional symptoms may include glare sensitivity and altered color perception. Follow medical advice and use medications such as reduced glutathione eye drops, pirenoxine sodium eye drops, or phacolysine eye drops for treatment.

5. Glaucoma

Glaucoma is a serious eye disease potentially linked to genetic factors or abnormal eye structures. Increased intraocular pressure damages the optic nerve, impairing vision. It may also cause eye pain, headache, nausea, and vomiting. Follow your doctor’s instructions and use medications such as pilocarpine nitrate eye drops, timolol maleate eye drops, or latanoprost eye drops for treatment.

To maintain eye health, it is important to develop good visual habits, avoid prolonged screen exposure or close-up reading, and ensure regular breaks and time away from electronic devices.