Vision care

Lacking sufficient lutein intake and macular degeneration

Macular degeneration, also known as age-related macular degeneration (AMD or ARMD), is a medical condition which may result in blurred or no vision in the center of the visual field. Macular degeneration typically occurs in older people, and in high myopia. Age-related macular degeneration is one of the major causes of blindness in middle-aged and elderly individuals.

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Visible light is needed to the visual system to build a representation of the surrounding environment onto the retina. The retina is a thin membrane, act as film in a camera. The macula is an oval-shaped pigmented area near the center of the retina. Although the macula comprises only five percent of retinal area, it is responsible for the majority of useful photopic vision. The macula is densely packed with photoreceptor cells called rods and cones that react to light, these cells act as image sensor in a cellphone. Light enters the eye and then the cornea and lens act together as a compound lens to project an inverted image onto the macula of retina,
and then light is converted into neuronal signals. These signals are processed by brain to interpret the images. If the macula is damaged, e.g., macular degeneration, vision is impaired.

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Exposure to bright light may contribute to macular damage.

Macular degeneration Older people and high myopia are prone to macular degeneration if the macula is damaged.
Mobile phone overuse in modern society is common. The display screens of smartphones and other digital devices emit significant amounts of blue light. Exposure to blue light could cause serious long-term damage to your eyes. In addition, the cornea and lens are very effective at blocking UV rays from reaching the light-sensitive retina. However, blue light passes through the cornea and lens and reaches the light-sensitive macula of retina. Lutein appears yellow which absorbs blue light. Thus, it can serve as a photoprotectant for the macula from the damaging effects of free radicals produced by blue light. Lacking sufficient lutein intake decreases macula pigmentation and increases the risk for eye diseases such as age-related macular degeneration.

Doctor advised that green leafy vegetables are a good source of lutein. Supplement of lutein is also recommended for the protection of macula.

Susceptible individuals for macular degeneration

Pathologic myopia (PM) Refractive error of at least -6.00D!

Refractive error higher than -6.00D leads to the degeneration of chorioretinal tissue associated with axial elongation of the eye, poor circulation of the eye, and thinned retinal layers. These conditions contribute to the development of macular degeneration.

Age-related macular degeneration (AMD) Aged 55 and above!

Oxidative stress and impaired nutrient exchange in macula are the causes of age-related macular degeneration. The imbalance between production of damaged cellular components and degradation leads to the accumulation of detrimental products, such as free radicals. Poor choroidal circulation leads to the increase of oxidative stress, increases the risk of developing age-related macular degeneration.

Idiopathic Intense use of eyes, 16+ hours a day!

Young patients with macular degeneration are increasing. Excessive time spent in front of a smartphone screen can increase risk of macular degeneration, especially in young people.

Game for macula test
http://game.ioxapp.com/color/

Amsler grid for macular degeneration self test

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    1. Measure a distance of about 30 cm from your eyes to Amsler grid
      Test your vision with adequate lighting.
    2. If you normally wear reading glasses or bifocals for near work, put them on to view the grid.
    3. Cover your left eye, but do not close it or press on it.
      With your right eye, stare directly at the spot in the center of the grid, and do not look away from this spot.
    4. Switch to the other eye and repeat.

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If any of the lines in the grid appear wavy, blurred or distorted, you must consult an eye doctor as soon as possible. Daily supplement of lutein and consumption of fresh vegetables are helpful.

 

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