Other factors causing blurry vision
People with myopia (near-sightedness), which can cause blurred vision when looking at objects in the distance, will usually squint their eyes to see those objects in the distance clearer. Myopia can then further strain their eyes and cause other symptoms, such as headaches.
Hypermetropia, or hyperopia, most commonly known as farsightedness, is the opposite of myopia. Hypermetropia occurs when objects in the distance are usually seen clearly, but nearby objects are not. These nearby objects appear blurry, so the eye muscles will overcompensate, which can result in eye strain and eye fatigue when trying to focus on seeing the near object clearly.
With astigmatism, near and far distances can appear to be blurred. This is caused by a refractive error in the lens, which can be a result of an irregularly-shaped cornea. The eyes of people with astigmatism do absorb light rays, but those light rays do not land on the retina (the back of the eye), which results in blurry or distorted vision.
Presbyopia is an age-related eye condition. The blurred vision occurs, like with hypermetropia, when focusing on nearby objects. Due to the lens losing its elasticity, accommodation (the relaxation and tensing of the eye muscles, making them able to switch between distant view and nearby objects) becomes harder, making it difficult for you to read fine print, newspapers, or text on mobile and on computer screens. These symptoms tend to become more prevalent as you age.
This is when people with type 1 or type 2 diabetes develop deterioration of the blood vessels in the back of the retina. When the blood vessels in the retina are severely damaged, the retina can weaken, resulting in failing to process light signals efficiently, which can cause blurred and distorted vision.
Age-related macular degeneration
This disease is an age-related eye condition. Age-related macular degeneration occurs when the macula, at the centre of the retina, fails to focus on objects, causing blurred vision, or in rare cases, total vision loss.
Seasonal allergies can also affect our quality of vision, as they can irritate the corneal surface of the eye. When the cornea is inflamed due to exposure to external elements such as dust, pollen, or pollution, it can be hard to focus on objects clearly, resulting in temporary blurred vision.
Your optometrist will then carry out the following examinations:
- A check of how clearly you can see letters on a chart from distance, alternately covering your right and left eye
- Refraction tests
- Examining your external ocular health
- Examining your internal ocular health
- Imaging of the eye, if required
How is blurred vision treated?
Depending on the cause, there can be various treatments. Some are listed below.
- Glasses or contact lenses
- Medicated and antibacterial eye drops
- Laser surgeries such as LASIK
- Certain medications to control blurred vision symptoms
- Getting sufficient sleep
- Avoiding reading fine print or text in dim light
- Drinking plenty of water to hydrate and lubricate the eyes
Can blurred vision be prevented?
It cannot always be prevented. In some cases, blurred vision can be the result of age. In other cases, it cannot be prevented, but it can be treated. There are some measures you can take that might help:
- Regular eye examinations, at least once every two years
- Always wash your hands before putting in contact lenses
- Always wear sunglasses when out in the sun
- Consume a diet rich in healthy fats such as nuts and seeds, and antioxidants such as leafy vegetables. A high intake of vitamins A and C is also recommended.