A decrease in the strength of ciliary muscle contraction

An increase in the strength of ciliary muscle contraction

A decrease in the ability of the cornea to change curvature

A decrease in the curvature of the cornea with age

An increase in the power of accommodation

A decrease in the ability of the lens to change curvature

A decrease in the strength of pupillary contraction

A decrease in the curvature of the lens with age

Hearing sensitivity relative to normal hearing

Hearing sensitivity relative to the hearing of others in the class 

Hearing sensitivity relative to 0 dB Sound Pressure Level

Hearing sensitivity relative to the background noise 

Hearing sensitivity relative to 20 μPascals