Different Eye Conditions
Normal sight: Emmetropia
A person with normal sight has eyes of the right length (from lens to retina) so the image of a distant object can be focused on the retina without any distortion.
The image of a distant object is focused in front of the retina, because the eye may be too long or light refraction is too strong. Distance vision will be blurred; near vision is generally good.
The image of a distant object is focused behind the retina, because the eye may be too short or the refractive mechanism is too weak. Close work is generally difficult. Distance vision is usually good in younger people, but tends to be reduced in older people.
An astigmatic eye looks more like a rugby ball than a football in shape. Both distance and near vision are likely to be equally affected. Astigmatism can be found with both short and long-sightedness.
This translates as ‘old eye'. It starts to affect us in our early to mid-40s, as the lens becomes less flexible, reducing its power to focus on close objects. Symptoms include eyestrain and headaches while doing close work such as reading, writing and sewing, blurry vision and eye fatigue.
Nutritional supplements that have been linked to maintaining good eye health are available in many fruits, vegetables and foods however if you need an additional vitamin & mineral boost please visit your local pharmacy and ask your pharmacist, for advice.
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More info: Allergy Screening Service