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Why are some words sharp and others blurred when reading is to do with the retina of the eye?
Wiki User
∙ 11y ago
If the area in the center of your vision is blurred, that is likely to be macular degeneration. If everything is blurry especially in strong light, it's likely to be a cataract. In any case, see a doctor.
Wiki User
∙ 11y ago
The sharpness or blurriness of words when reading is influenced by the focus of light on the retina. When light rays converge accurately on the retina, it creates a sharp image. However, if the light rays don't focus properly on the retina, due to factors like refractive errors or eye conditions, it can result in blurred vision while reading.
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It actually depends on the lens. For the image to be sharp on the retina, all the rays of light coming off the object must meet together at the same point on the retina. If the rays of light meet somewhere in front of the retina, the lens focuses by stretching itself and becoming thinner. This spreads out the rays of light, making them go further into the eye until they reach the middle of the retina. If the rays of light are behind the retina, the lens thickens to focus.
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Which type of photoreceptor would be affected by macular degeneration?
Cone cells are the predominant photoreceptor cells in the macula (the center of the retina) with the highest concentration of them found in the fovea. Cone cells are necessary for our color vision and clarity (sharp, detailed vision). Cone cells start deteriorating because of macular degeneration - they aren't functioning well or there are less of them because they are dying. The result of less cone cells is a loss of one's color vision. Colors are less vivid. It becomes hard to distinguish similar colors - such as dark grey and navy blue. Another macular degeneration symptom is vision is not as sharp and clear, but rather blurred.
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The retina does not have a uniform distribution of sensors, the rods (for low light levels) and cones (for color vision). There is a spot in the middle of the retina called the macula, where sensors are particularly dense. That is why you see more detail directly in front of you, and less detail in your peripheral vision.
