Causes of visual impairment

Common causes of vision loss or visual impairment include ocular damage, hereditary disorders, infectious diseases, and the like. (1-4)

Blurring during play, during work, or due to an accident can cause visual impairment or injury.

If you have a mother with a measles virus infection like Germany that is transmitted to the developing fetus from the mother during pregnancy, the baby may be blind or there may be visual impairment at birth.

Eye trachoma caused by infectious microorganisms known as Chlamydia trachomatis can also impair eyesight. Water and sanitation are poor in these countries, both in developing and developing countries.

This can be seen with perspective or "lazy eyes". Because the projection method of the two eyes are different, different information is transmitted to the brain, and the brain may close or suppress images from weak eyes.

Usually the lens is sharp enough to focus the light onto the retina. Cataract prevents light from passing through the lens and causes a loss of vision.

This situation usually affects elderly people. Symptoms include cloudy or blurred vision, difficulty in seeing, bright light in dimly lit places, fading, double vision, and so on.

Cataract affects 20.5 million Americans (1/6 in 6 people) over the age of 40. At the age of 80, over half of Americans suffer from cataracts.

Diabetes affects small vessels of the retina. Damaged visual acuity can cause injury

Of that, 7 million people were not diagnosed. Currently, 1 out of 10 people suffer from diabetes. 40 to 45% of all diabetic patients suffer from diabetic retinopathy

This condition is caused by an increase in intraocular pressure. Increased stress may damage the optic nerve and impair vision

African Americans (over 40) are 4 to 5 times more likely to become glaucoma than any other ethnic group

Progressive visual loss due to age-related macular degeneration or AMD, macular damage in the most sensitive part of the retina

AMD affects more than 75 million people in the United States. As the aging population is rapidly increasing in the US, this figure is expected to increase to nearly 3 million by 2020.

The center of the field appears blurry or opaque. Patients can not concentrate clearly. This mainly happens to the elderly

Retinoblastoma is the child's most common cancer of the eye. 300 to 400 new cases are diagnosed every year

Visual impairment is a comprehensive term used to explain blindness that can be inherently caused by many different medical conditions. Some common causes of visual impairment are glaucoma, retinopathy of prematurity, cataract, retinal detachment, macular degeneration, diabetic retinopathy, cortical visual impairment, infection and trauma. These are just a few of the conditions that affect vision, each with its own characteristics and clinical features. In addition, the effects of visual impairment on individual learning are related to the onset, severity and type of vision loss, as well as any coexisting obstacles that may be present in children. Therefore, considering visual impairment, correspondence, change, and strategy in all classrooms must be designed according to each student's individual needs. No model for everyone

In this course, I teach visually impaired and blind students, but I am also interested in visually pupils. The students I teach have various visual impairments. There are various causes of visual impairment, causing various visual problems. Depending on the accident, sickness, or condition of the eyes, the child may become blind or blind. Some people are completely blind, others see light, shadows, colors, but they do not have useful eyesight. There are various eye diseases such as cataract, glaucoma, ROP, macular degeneration, isolated retina, whitening. Depending on the state of the eyes, it may become blurred, distorted, incomplete images.

Five million children worldwide suffer from visual impairment. There are many eye diseases that can cause child vision disorder. They are white skin diseases, cataracts, white blood cells, cortical vision disorder (CVI), glaucoma, nystagmus, optic neuropathy, retinopathy of prematurity and retinitis pigmentosa. () There are many factors that affect the ability of the visually impaired to cope with the state and function. Assistance from professional therapists may be a major factor, family attitude is also important. In addition, social and emotional security has proven to be very important