What is presbyopia?
Presbyopia is farsightedness caused by loss of elasticity of the lens of the eye, occurring typically in middle and old age(Goldstein, 2014)
What causes Presbyopia?
Presbyopia is caused by age. This differs from other visual problems such as astigmatism, nearsightedness and farsightedness which are related to the shape of the eyeball and are caused by genetic and environmental factors. The eye's lens stiffens with age, so it is less able to focus when you view something up close.
What age does Presbyopia start?Presbyopia usually occurs beginning at around age 40. If your 40 or older you have probably started experiencing blurred near vision when reading, sewing or working on a computer.
Anatomy of the eye
The human eye has been called the most complex organ in our body. It's amazing that something so small can have so many working parts.
Beauty of the Eye
The entire round part of the eye
· Light reflected from an object hits the retina’s rods and cones.
· Rods and cones send neural signals to the bipolar cells.
· Bipolar cells send signals to the ganglion cells.
· Ganglion cells send signals through the optic nerve to the brain.
Gestalt psychologists described several principles people use to make sense of what they see. These principles include figure and ground, proximity, closure, similarity, continuity, and simplicity (Goldstein, 2014).You see, you can't escape presbyopia even if you've never had a vision problem before. People who never wore glasses or had a problem with their vision will eventually notice that their vision will start to blur. Gregory, 2000, states in order to process information we all are equipped with sense organs. Each sense organ is part of a sensory system which receives sensory inputs and transmits sensory information to the brain (Gregory, 2000)
Goldstein, E. B. (2014). Sensation and perception (9th ed.). Belmont, CA: Wadsworth.
Gregory, R. (2000). The Intelligent Eye. London: Weidenfeld and Nicolson.
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