Journal Entry 2

1. what causes the defect?

• Short-sightedness occurs when the focal point in the eye drifts away from the retina.
• Long-sightedness occurs when the focal point drifts behind the retina.  

    2.   the symptoms displayed.

• Close objects appear fuzzy or blurry, while distant objects remain in focus.
• Headaches or tired eyes. In young people with long sight, the eyes can still focus on near objects, for example when reading a book. 
• Squints.

     3.   propose what sort of lens may be used to correct each vision.

• Short-sightedness could be corrected by using glasses that have concave lenses so that the focal distance will increase in your vision or sight.
• Long-sightendess could be corrected by using glasses that have convex lenses so that the focal distance will decrease in your vision or sight.

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