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Optician Q&A

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What Causes Blurred Vision?

Answer:

Blurry vision is an incredibly broad term and as such, can be caused by an incredibly broad range of things.

 

Non-serious causes of blurred vision:

 

  • Hyperopia - If you have hyperopia (farsightedness), distant objects may remain clear but your eyes can't focus properly on close-up objects, or doing so causes unusual eye strain and fatigue. In cases of severe farsightedness, even distant objects may appear blurred.

  • Astigmatism - Blurred vision at all distances often is a symptom of astigmatism. A type of refractive error, astigmatism usually is caused by an irregularly shaped cornea.

  • Presbyopia - If you're over age 40 and are starting to notice blurry vision up close — when reading a text message, a restaurant menu, food label or other small print, for example. Chances are, this is due to the onset of presbyopia, a normal age-related vision problem.

  • Myopia - Symptoms of myopia (nearsightedness) include squinting, eye strain, headaches and blurry vision in one or both eyes. Myopia is the most common refractive errors and causes objects in the distance to appear blurred.

  • Eye floaters - Vision can be blurred by temporary spots or floaters drifting in your field of vision. Floaters typically appear when the eye's gel-like vitreous begins to liquify with age, causing microscopic bits of tissue to float freely inside the eye, casting shadows on the retina.

  • Pregnancy - Blurry vision is common during pregnancy and sometimes is accompanied by diplopia (double vision). Hormonal changes can alter the shape and thickness of your cornea, causing your vision to blur. Dry eyes also are common in pregnant women and can cause blurred vision.


Serious causes of blurred vision also exist, such as: cataracts, glaucoma, diabetic retinopathy, cardiovascular disease, or age-related macular degeneration. If you reckon you may be experiencing any of these conditions, speak to a doctor or eye specialist immediately.

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