Common causes of blurred vision
Blurred vision can arise from many different conditions affecting the eye. Some causes are minor and easily corrected, while others require medical treatment or ongoing monitoring.
Typical causes include:
- refractive changes such as myopia or presbyopia
- cataracts causing gradual clouding of the natural lens
- glaucoma affecting the optic nerve
- retinal conditions such as macular degeneration
- dry eye affecting tear film stability
A proper eye examination helps determine which of these factors may be contributing to visual changes.
Blurred vision from cataracts
Cataracts cause the natural lens of the eye to become progressively cloudy. Many patients notice increasing blur, glare from lights, difficulty with night driving, or reduced contrast.
Cataracts typically develop gradually and may affect everyday tasks such as reading, driving, or computer work.
A detailed examination helps determine whether cataracts are responsible for visual changes and whether treatment may eventually be appropriate.
Learn more about cataracts
Blurred vision related to glaucoma
Glaucoma is a condition affecting the optic nerve and may develop slowly without obvious symptoms in early stages. Some patients eventually notice reduced peripheral vision or general visual changes.
Regular eye examinations are important because glaucoma can often be detected before significant vision loss occurs.
Glaucoma screening and monitoring
When blurred vision should be evaluated
Blurred vision should always be assessed if it:
- appears suddenly
- worsens quickly
- occurs with eye pain
- is accompanied by flashes or floaters
- interferes with reading, driving, or daily activities
Prompt evaluation helps ensure that potentially serious causes are identified early.
How blurred vision is evaluated
Evaluation typically includes:
- visual acuity testing
- refraction when appropriate
- slit-lamp examination
- intraocular pressure measurement
- retinal examination
These steps help identify the source of visual change and determine the most appropriate next step.