Tailoring the lenses to your individual visual needs/preferences
1. What types of lenses are there?
Single Vision lenses ( stock / grind ) – Used for reading/mobile/iPad (near), computer/laptop (intermediate), driving/TV (far/distance)
ADVANTAGES: Maximising the area in your lenses to the single preferred distance from user ( SINGLE VISION = One single optimum focusing distance )
DISADVANTAGES: Not capable to see multiple distances. For example, the correctly supporting single vision (SV) lenses for reading may be optimal for reading documents or using the mobile at the common 40cm but not ideal for the computer at 60-80cm or any objects even further away including driving/TV/classroom whiteboard/work meeting
Extended focus lenses / Office lenses / desk – copmuter and reading in the same lens .
5 Common Eye Conditions and Diseases
There are approximately 160 million people who are visually impaired and have some degree of low vision. Low vision can be characterized by partial sight, such as blurred vision, distorted vision, shadows, blind spots or tunnel vision and legal blindness. Early detection is crucial for common eye conditions such as Glaucoma, Macular Degeneration or Retinitis Pigmentosa or Diabetic Retinopathy.
Glaucoma is a leading cause of blindness. Glaucoma is an eye condition in which the optic nerve is damaged, causing vision loss. The optic nerve is located at the back of the eye and transmits the images we see to the brain for interpretation. Glaucoma results in progressive damage to the optic nerve, which almost always begins with a subtle loss of peripheral (side) vision.
A cataract is clouding of the eye’s natural lens. Our eyes’ lens is mainly made up of water and protein. The proteins are arranged in such a way that the lens stays clean and light is able to pass through. As we grow older, some of these proteins may clump together and start to cloud a small area of the lens. This is a cataract.
Macular Degeneration is a medical condition often associated with aging that results in a loss of vision in the centre of your visual field. Central vision helps us to see objects clearly and perform tasks such as reading and driving.
Diabetic Retinopathy is a complication caused by diabetes where the retina (the light sensitive tissue that lines the inner surface of the eye) is damaged. Diabetes causes abnormal changes in the body’s blood sugar levels. High levels of blood sugar can alter the blood flow to the body’s organs, including the eyes.
Retinitis Pigmentosa is a group of genetic eye conditions causing progressive degeneration of the retina, the light sensitive layer of tissue lining the back of the eye. The light receptors of the retina are called rods and cones. As a result of Retinitis Pigmentosa, the rods and cones slowly die, causing reduced vision.
Glaucoma is a very confusing and misunderstood disease. Often, people don’t realize the severity or who is affected. Regular Glaucoma Scans are your best defence.
Four Key Facts about Glaucoma:
- Glaucoma is a leading cause of blindness
- There is no cure (yet)
- Everyone is at risk
- There may be virtually no symptoms
According to the World Health Organisation, Glaucoma is the second leading cause of blindness in the world. High-risk groups include:
- people over 60
- family members of those already diagnosed
- people who are severely nearsighted.
Estimates put the total number of suspected cases of glaucoma at over 60 million worldwide.
The causes of cataracts can be from long-term exposure to ultra-violet light, diabetes, obesity, family history and smoking.
While cataracts can be present at birth or acquired as a result of disease (such as diabetes), trauma to the eye, exposure to radiation or prolonged use of steroids, most instances of cataracts occur later in life, making ageing one of the highest risk factors for cataracts.
Cataracts usually affect both eyes but often develop at different rates in each eye. As the cataract grows, you may experience the following symptoms:
- blurry vision
- sensitivity to bright light and glare
- difficulty reading, recognising faces and watching television
- dullness in colours