Articles starting with 'D':
|Degenerative Myopia |
Technically known as myopia (my-O-pe-ah)nearsightedness is a vision problem that affects over 25 per cent of adults worldwide and it is the most common vision problem in the United States. Nearsighted people experience difficulty seeing objects at a distancebut can see objects at close range. Myopia occurs because the eyeball is too long as measured from front to back. As a resultlight focuses in front of the retina instead of directly on it causing blurred distant ob... Read More|
Gravityloss of elastic tissue in the skinand weakening of connective tissues in the eyelid frequently contribute to this sagging eyelid tissue.
Excess and droopy eyelid skin and muscle is known as dermatochalasis. It is a common finding seen in elderly persons and it occurs evenly in both men and women. Gravityloss of elastic tissue in the skinand weakening of connective tissues in the eyelid frequently contribute to this sagging eyelid tis... Read More|
Diabetes is a major health issue in North America. There are approximately 1.4 million people in Canada with diabetes and this number is expected to increase to 3 million by 2010. According to the Ontario Ministry of Healthas many as 200000 residents in Ontario have the disease and do not even know it.
Why is the incidence of diabetes still increasing at alarming rates? One factor is the improved methods of diagnosiswhich makes it easier to identify new diabetics.... Read More|
|Diabetes and the Eyes |
Diabetes and the Eyes
Vision impairment is a frequent complication of diabetes.
General Overview Right nowthe World Health Organization estimates that more than 150 million people worldwide have diabetes. This common condition needs special attention and constant monitoring. Generallyit is a disease in which the body does not produce or properly use insulin – a hormone needed to convert sugarstarches or other food into energy. The cause of diabetes ... Read More|
In the advanced stagesconnective scar tissue forms in association with new blood vessel growthcausing additional distortion and blurriness.
Diabetes is a condition that can interfere with the body’s ability to use and store sugar. Diabetes can alsoover timeweaken and cause changes in the small blood vessels that nourish the eye’s light sensitive retina. When this occursit is called diabetic retinopathy. These changes may include ... Read More|
|Diabetic Retinopathy |
Diabetic retinopathy is a complication of diabetes and a leading cause of blindness. It occurs when diabetes damages the tiny blood vessels inside the retinathe light-sensitive tissue at the back of the eye. A healthy retina is necessary for good vision. If you have diabetic retinopathyat first you may notice no changes to your vision. But over timediabetic retinopathy can get worse and cause vision loss. Diabetic retinopathy usually affects both eyes.
WHAT ARE THE STA... Read More|
|Differences in Eyecare Practitioners |
Differences in Eyecare Practitioners
The three tiers of the ocular health care system provide individuals with an outstanding level of patient care.
Often referred to as the ‘three Os’the three tiers of the ocular health care system provide individuals with an outstanding level of patient care. Although there is some overlap of responsibilities among the tierseach level performs a different and important function. Optometrists A Doctor of Optometr... Read More|
|Different Types of LASIK Surgery |
Different Types of LASIK Surgery
A device called a wavefront analyzer measures the way light travels through your eyeand compares it to the way light travels through an eye with perfect vision.
1. LASIK LASIKan acronym for Laser in-situ Keratomileusis (ker’’ah-to-mih-lu-sis)is currently the most common type of laser vision correction. It can correct nearsightednessfarsightedness and astigmatism. Light is properly focused on the retina by permanently... Read More|
|Diseases of the Eye|
|There are many reasons why people need artificial eyes or ocular prosthesis. Thankfully, advancements in science now allow people that have lost an eye to often adapt to their limited vision. A skilled ocularist can now create artificial eyes that so closely match the natural eye, that they typically go unnoticed. The most common cause of eye loss is trauma or injury, but many chronic eye diseases can also lead to eye removal. Five common eye diseases that can ultimately result in the removal of... Read More|
|Do Glasses Weaken Your Eyes? |
Do Glasses Weaken Your Eyes?
When you take them off you feel “blind”. Have the glasses weakened your eyes? Rest assuredthe answer is no.
Since getting your new glasses you probably see better than ever. But now it seems you can’t get along without them. When you take them off you feel “blind”. The obvious thought strikes: have the glasses weakened your eyes? Rest assuredthe answer is no. Think about what your vision was like before you h... Read More|
|Dots and Lines |
Dots and Lines
Stare at the pattern for 10 seconds or longerand then switch your gaze immediately to a white surfacesuch as a blank wall or a piece of paper. What do you see?
Answer: you will see the exact opposite of the diagram: white squares on a black background.
Are the horizontal lines parallel to each other or are they sloped or curved?
Answer: They are parallelbut put a ruler up to your screen to confirm this.
How many black dots... Read More|
|Do You Qualify for LASIK? |
Do You Qualify for LASIK?
Although there are certain vision factors that may make you a better candidate for LASIKyour personality is even more important. The following checklist will help you decide if you are the type of person who will most likely be happy with laser vision correction. GOOD CANDIDATES People likely to be happy with the results of LASIK find most of the following sentiments to be true:
I feel handicapped by my dependence on corrective lenses
I have n... Read More|
|Dry Eyes Are More Than A Nuisance |
Dry Eye is a condition characterized by an insufficiency in the amount or quality of tears
For the millions of Americans who do suffer from DESit can get in the way of daily living.
If you don t suffer from dry eye syndrome (DES)chances are you ve never heard of it. It is a condition characterized by an insufficiency in the amount or quality of tears. For the millions of Americans who do suffer from DESit can get in the way of daily living. Our eyes need tears ... Read More|
|Dry Eye Syndrome|
Dry Eye Syndrome
Did you know: At age 65the eye produces approximately 60% fewer tears than it did at age 18.
Did you ever wonder why your eyes are covered with tears? It s because the delicate tissue on the surface of the eyethe corneahas no blood supply - it has a tear supply instead. Rather than getting important things like oxygen and electrolytes from the bloodyour eyes get these substances from the watery layer of your tears. The tear layer acts as a barri... Read More|
|Dry Eye Syndrome |
|Dry Eye Syndrome
Did you ever wonder why your eyes are covered with tears? It s because the delicate tissue on the surface of the eyethe corneahas no blood supply - it has a tear supply instead. Rather than getting important things like oxygen and electrolytes from the bloodyour eyes get these substances from the watery layer of your tears. The tear layer acts as a barrier to infectionkeeps the surface of the eye clearand provides the neces... Read More|
|Dry Eye Syndrome Winter |
Dry Eye Syndrome in Winter
Dry eyes are common in winter. This symptom is considerably seen more in older people. As one agestheir retaining power of tear gland becomes weak. Tear glands are like a faucet and the tear ducts are drainpipes. Dry skinchapped lips can be healed easily but in case of eyeit is complicated to pick up any drops and use. Your eyes are the window to the worldif you lost the sightyou lost it forever. Sowhen it’s about eye problemalw... Read More|
|Dry Eye Test |
Dry Eye Test
Before you visit your doctorthis is a simple test that may help determine if you suffer from Dry Eye Syndrome. Please note that this test should not be used to replace your visit(s) to your eye doctor – it is simply a screening test. Your eye care provider will ask you questions about your symptoms and perform other tests to determine the causeseverityand treatment options for dry eye. To participatejust follow the instructions below. 1. The focal point of t... Read More|
Example of Duane s Syndrome affecting the right eye. The right eye has difficulty turning outwards and the lid aperture narrows.
Duane’s syndrome is an unusual eye muscle problem. It is a type of strabismusa term that describes eyes that are not properly aligned or do not move normally. With Duane’sthe eyes do not always move together because the affected eye has limited movement in one direction (usually outward). Childr... Read More|
This condition has nothing to do with intelligence – in factmost dyslexics have normal or above-normal intelligence...
The ability to read – something that most of us take for granted – is a very complex skill. A child needs to have a certain level of brain “readiness” (maturation) in order to coordinate all the visual and perceptual tasks that reading requires. Some children simply need more time to learn how to read... Read More|