A Machinist with Normal Vision Has a near Point at 25

question 28

Multiple Choice

A machinist with normal vision has a near point at 25 cm.The machinist wears eyeglasses in order to do close work.The power of the lenses is +1.75 diopters.With these eyeglasses,what is the near point of the machinist?

• A) 17 cm
• B) 14 cm
• C) 10 cm
• D) 21 cm
• E) 24 cm

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Definitions:

Substance P

A neuropeptide involved in the transmission of pain and other sensory signals to the brain, also implicated in inflammatory processes.

Endorphins

Neurotransmitters produced by the nervous system to cope with pain or stress, often described as "natural painkillers."

Sodium Ions

Charged particles of sodium, essential for the electrical signaling in nervous system and regulation of blood pressure.

Vestibular Sensation

The sense related to balance and spatial orientation, arising from the inner ear and processed by the brain's vestibular system.