week looking
The term double vision is used to describe any type of vision loss, whether the patient is unable to see at all or has partial vision loss, and in fact, many people may have vision problems at an early stage. their lives, such as the inability to see. things at long distances, or trouble reading small print, which are conditions that can be easily treated by wearing glasses or contact lenses, but if one or more parts of the eye or brain needed to process images become diseased or damaged, leading to complete loss of vision. In these cases, vision cannot be fully restored with medical treatment, surgery, or prescription lenses, such as glasses or contact lenses.
Symptoms of low vision
These symptoms can be an early warning of vision loss or eye disease, and the chance of preserving residual vision increases once vision loss or eye disease is detected early by an eye specialist. In fact, these symptoms can occur despite wearing glasses and contact lenses, and these difficult symptoms include:
- Read, cook, sew and fix things at home.
- See clearly with lights, or feel dark.
Low vision diagnosis
Visual impairment can be diagnosed with the following tests:
Visual acuity test: An eye test that checks how well you can see the details of a letter or symbol from a distance. One of the following methods:
Snellen test: This test uses a box of letters or symbols of different sizes, arranged in rows and columns, and asks the person to look at them at a distance of 4 to 6 meters, the operation is done with the other eye and the doctor asks the person to read the letters smaller and smaller until they reach a point where they cannot distinguish between the letters accurately.
Random E Quiz: In this quiz, a person is asked to determine the direction of the letter "E" either up, down, left, or right after looking at a graph.
Visual field test, which is a way to measure how well an individual sees, either central or side vision, and blind spots or fainting are detected in this test. Complete and take the full test to gain useful vision insights.
Intraocular pressure measurement: This test measures the pressure inside the eye. This test is used to detect glaucoma, an eye disease that can cause blindness by damaging the optic nerve at the back of the eye. Among the methods used to measure intraocular pressure:
Tonometer: This type of eye pressure measurement uses a small probe to gently flatten a part of the cornea, as well as a slit-lamp microscope to look inside the eyes. The pressure in the eye is measured by the force needed to flatten the cornea, and this type of eye pressure measurement is very accurate.
Electronic Tonometer: In this way, intraocular pressure is measured by placing a pen-like instrument directly on the cornea and then an intraocular pressure reading is displayed on a small computer panel.
Pneumatic Tonometer: Intraocular pressure is measured by using a puff of air to stretch the cornea, but this method is not the best way to measure intraocular pressure, but it is used as a simple way to check for high intraocular pressure, and is the most easy. How to measure eye pressure in children.
Causes of double vision
There are many causes of visual impairment, including the following:
- Amblyopia: This is poor vision in the eye as a result of not using this eye in early childhood.
- Cataracts: Cataracts prevent light from passing easily through the lens, leading to vision loss. In fact, cataracts develop slowly and usually affect people in their sixties and seventies, but sometimes some children can be born with congenital cataracts. Cataract symptoms include double vision, blurred vision, and difficulty seeing in dim light and dim colors.
- Diabetic retinopathy: Diabetic retinopathy is caused by damage to the tiny blood vessels in the retina as a result of diabetes. To help prevent retinopathy, diabetics should avoid smoking and keep their blood pressure and blood sugar levels within target ranges.
- Glaucoma: Increased pressure inside the eye that causes damage to the optic nerve.
- Macular degeneration: It is a gradual deterioration of the macula, which is the most sensitive area of the retina, where macular degeneration leads to a gradual loss of central vision represented in the ability to see fine details directly. In fact, macular degeneration is related to age, since it occurs in older adults, especially those over 60 years of age. Excessive exposure to sunlight and smoking can increase the risk of age-related macular degeneration, and symptoms include increased difficulty reading and watching television, and distorted vision where straight lines appear wavy or objects appear larger or smaller. smaller than normal size.
- Trachoma – Trachoma often occurs in poor rural areas with crowded conditions and limited water and sanitation, and is actually an eye infection caused by an infectious microorganism called Chlamydia trachomatis.
Comments
Post a Comment