Why some people can't see?

# Understanding Blindness Blindness is a condition characterized by the loss or absence of vision. While it can be a daunting experience, it's important to understand the various factors that can lead to blindness. This overview outlines some common causes and types of blindness. ## Causes of Blindness 1. **Genetic Factors** - Some people are born with genetic conditions that affect their eyesight. These conditions can include retinitis pigmentosa or congenital cataracts, which may lead to partial or complete blindness from birth or develop later in life. 2. **Diseases and Infections** - Diseases such as glaucoma, diabetic retinopathy, and age-related macular degeneration (AMD) are significant causes of blindness. Infections like trachoma and onchocerciasis (river blindness) can also lead to vision loss if untreated. 3. **Injuries** - Physical trauma to the eye or brain can result in blindness. This can occur from accidents, exposure to harmful chemicals, or severe head injuries that damage the visual pathways. 4. **Nutritional Deficiencies** - Inadequate intake of essential nutrients, especially vitamin A, can lead to blindness. Vitamin A deficiency is a leading cause of preventable blindness in children worldwide. 5. **Age-Related Factors** - As people age, the risk of developing eye conditions that lead to blindness increases. Cataracts, for example, are more common in older adults and can cause significant vision impairment. ## Types of Blindness 1. **Partial Blindness** - Individuals with partial blindness have limited vision, which may not be correctable by standard glasses or contact lenses. They may still perceive light and some shapes. 2. **Complete Blindness** - Also known as "total blindness," this condition is characterized by a complete lack of vision. Individuals with complete blindness cannot see anything, including light. ## Prevention and Treatment - **Regular Eye Examinations:** Early detection of eye conditions can prevent vision loss. Regular check-ups with an eye care professional are crucial. - **Healthy Lifestyle:** Maintaining a balanced diet rich in essential nutrients, avoiding smoking, and protecting eyes from UV rays can help preserve vision. - **Medical Interventions:** Treatments such as surgery for cataracts, laser therapy for diabetic retinopathy, and medications for glaucoma can help prevent or slow the progression of blindness. - **Education and Support:** For those who are blind, access to resources such as Braille education, orientation and mobility training, and assistive technologies can significantly improve quality of life. Understanding the causes and types of blindness is crucial for prevention and management. By raising awareness and supporting research and treatment, society can help reduce the impact of this condition.

# The Importance of Our Eyes Our eyes are vital organs that serve as our windows to the world, allowing us to perceive and interpret our surroundings. They play an essential role in various aspects of our daily lives: ## Vision and Perception The primary function of our eyes is to provide us with vision. Through a complex process, they capture light and convert it into electrical signals that our brain interprets as images. This ability to see helps us recognize shapes, colors, and movements, thereby facilitating our interaction with the environment. ## Communication and Expression Eyes are crucial for non-verbal communication. They convey emotions and intentions, such as happiness, sadness, surprise, or skepticism, often more powerfully than words can. This expressive capacity enhances our ability to connect with others on an emotional level. ## Safety and Navigation Our eyes help us navigate safely through our environment. They allow us to detect potential dangers, such as oncoming traffic or obstacles, enabling us to respond quickly and avoid accidents. ## Learning and Development Vision is integral to learning. From reading books to observing demonstrations, our eyes enable us to gather and process information, significantly contributing to cognitive development and education. # Why Some People Wear Spectacles While our eyes are remarkable, not everyone enjoys perfect vision. Various factors can lead to vision impairments, necessitating the use of spectacles: ## Refractive Errors The most common reason people wear spectacles is to correct refractive errors, which occur when the eye does not bend light properly. This can result in: - **Myopia (Nearsightedness):** Difficulty seeing distant objects clearly. - **Hyperopia (Farsightedness):** Difficulty seeing nearby objects clearly. - **Astigmatism:** Distorted vision due to an irregularly shaped cornea or lens. - **Presbyopia:** Age-related difficulty in focusing on close objects. ## Eye Strain and Fatigue Prolonged use of digital devices can lead to eye strain and fatigue, a condition often alleviated by wearing spectacles designed to filter blue light and reduce glare. ## Protection and Enhancement Spectacles can also serve as protective gear, shielding eyes from harmful UV rays or debris. Additionally, some people wear them for aesthetic purposes, as spectacles can be a fashion statement or enhance facial features. ## Medical Conditions Certain medical conditions, such as cataracts or retinal disorders, may necessitate the use of spectacles to improve vision or manage symptoms. In conclusion, our eyes are indispensable tools that enrich our lives in countless ways. Spectacles are a common solution for those who experience vision challenges, enabling them to enjoy clearer vision and improved quality of life.

I'm Sl, and I come from Birmingham, England. I started to stammer at the age of four or five.  My parents took me to a lot of different types of speech therapy, some in groups, some on a one to one basis.  The kind of advice I was given to control my stammer or to overcome my stammer were varied.  Here are a few: slowing down my breath

 costal breathing

 lengthy speech taking a deep breath before I spoke

 I had began in the class called, preschool stammer.  This term is labelled by the stammer speech therapist or the stammer speech pathologist.  My parents were reassured that most people who stammer in childhood soon grow out of it.  Well I was one of those who didn’t.

 I then joined the class called, childhood stammer.  I continued to attend speech therapy and joining in with their speech therapy activities and their speech therapy games.

 I then progressed to the class called, adult stammer.  I now decided that speech therapy was not really working for me.

 I decided to try my own method of self-help for stammering. Even though I had a stammer, at times I could talk very well.  As an example when I was drunk, I spoke nearly perfectly fluent.

 After nearly a year I managed to overcome my stammer and eradicate the stammer once and for all.  As a career I now help other people how to stop stammering.