Describe the Four Vision Problems of Hyperopia, Myopia, Astigmatism, and Presbyopia

question 16

Essay

Describe the four vision problems of hyperopia, myopia, astigmatism, and presbyopia, including their causes and treatments.

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Definitions:

Axons

Long, threadlike parts of nerve cells which transmit electrical impulses away from the neuron's cell body.

Myelin

A fatty substance that surrounds and insulates the axons of nerve cells, speeding up the transmission of electrical signals in the nervous system.

Antagonist

A substance that blocks or dampens a biological response by binding to and blocking a receptor rather than activating it.

Neurotransmitter

Compounds responsible for transmitting signals between neurons through synapses within the nervous system.