Eye Illusions

An eye illusion occurs when what you perceive is different from what you are seeing in reality. When you see an object, an image is captured on the retina which is then transferred to the brain where it gets processed. Because of some reasons, the brain perceives the image differently from what it is in reality. There are mainly divided into two types; physiological and cognitive.

Physiological

Physiological eye illusions occur as an after result of seeing images which like bright lights. Every response has a dedicated and individual neural pathway during the beginning stage of a visual processing. However the repetitive response of some channels can cause physiological disturbances which can change your perception. Mach Bands and Hermann's grid illustrations are the two types which prove helpful in explaining this unusual phenomenon. Lateral inhibition which causes an increase in the sharpness and contrast of a visual response explains the Mach Bands as well as the Hermann grid.

Cognitive

Another type of misconception is the cognitive eye illusion. This is mostly a result of people's individual differences in perceiving reality. During this type your eyes and brain make subconscious interpretations. This phenomenon is widely called as "mind games". They arise as a result of individual beliefs about worldly aspects causing subconscious interpretations. These Cognitive fallacies are further divided into four kinds namely fiction, ambiguous, paradox and distorting.

In fiction, you see things which do not exist and which only you can see. This could be a result of hallucinations and or schizophrenia.

In ambiguous, there is a perceptual replacement between two alternating inferences when you see certain objects or images. A famous example of this type of illusion is the Necker Cube.

In paradox the hallucination is triggered as a result of seeing objects which are impossible or paradoxical in reality. Objects such as the Penrose triangle are an example of this type of hallucination which is supported as a result of the misunderstanding perception that adjacent edges have to join.

In distorting, the objects we perceive are distorted in curvature, or length and size. Famous examples of these types are the Müller-Lyer and the Café wall creation.

Many artists have incorporated these deception techniques in their works. These deception techniques are also incorporated in films by the forced perspective technique. Christopher Nolan' latest film 'Inception' has incorporated the impossible staircase or Penrose stairs creation to explain how impossible creations are possible within the dream world.

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Eye Care Tips

Eyes are considered as the most important human organ as these can express emotions. Even though a person lacks the ability to talk, they eyes can speak for himself. Taking care of this special organ is indeed a must. Here are to 10 tips that can help you take care of your eyes and to prevent it from having eye disease.

Tip #1

One of the simplest and most basic is to wash your eyes with cold and clear running water. It greatly helps your eyes to stay refreshed.

Tip #2

Nutrition always makes a difference. On your diet, include foods that are rich in vitamins as these can make your eye healthier and appear brighter.

Engage yourself in an "anti-inflammatory diet". Avoid eating red meat. Instead, eat foods that are rich in omega-3 fatty acids like mackerel, salmon and halibut. Also, keep away from saturated fats. Alternatively, use monosaturated fats like olive oil. Inflammation is at the base of many different diseases. Eating foods that prevents inflammation as well as eating foods with antioxidants protects your eyes from these eye diseases including cataracts and macular degeneration.

Tip #3

Protect your eyes from the sun. Studies have shown that sun exposure is linked to the formation of cataracts and possibly to macular degeneration. Wear eyeglasses that have 100% UV protection.

Tip #4

Get rid of those dark bags under your eyes. With your eyes closed, place slices of cucumber for about 30 to 60 minutes.

Tip #5

Avoid smoking. Smoking increases the risk for having eye diseases and vision problems. It damages blood vessels resulting to constriction and development of atherosclerotic plaques. Such condition can deprive your eye tissues with oxygen.

Tip #6

For individuals who are usually in front of a computer screen or television, place cotton pads dipped in cold milled on their closed eyes for about 10 minutes.

Prevent stressing your eyes by sitting comfortably at your computer or television screens. Make sure that the screens are positioned slightly below the line of sight and are not too close or too far from you.

Tip #7

For itchy eyes, massage your scalp with curd.

Tip #8

Wash your face before going to sleep. Get rid of all the makeup and dirt that could have adverse reactions to your eyes.

Tip #9

Always wash your hands first before touching your eyes and the area around your eyes.

Tip #10

Have a thorough eye exam. This is the most important and most proactive step that a person should take to protect his or her eyes. This is very essential especially for individuals with a positive family history of eye problems.

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