What is a common cause of discomfort with contact lenses?

Discomfort with contact lenses can arise from various factors, and all the options listed contribute to this issue. Incorrect power can lead to visual disturbances and strain, as the lenses may not provide the necessary correction for the wearer's vision. This may result in eye fatigue and discomfort.

Improper hygiene is another important factor, as inadequate care can cause irritation, infections, or allergic reactions. If lenses are not cleaned or stored correctly, they can accumulate protein deposits, debris, or bacteria, leading to discomfort and potentially harmful eye conditions.

Poor fit is crucial as well; if lenses do not fit properly on the cornea, they can cause rubbing, pressure points, or movement issues. A poorly fitting lens may not provide adequate oxygen to the eye, causing dryness or irritation.

Since all these factors can independently contribute to discomfort, the correct answer encompasses the collective impact of these causes. Understanding each of these aspects is vital for proper contact lens care and ensuring a comfortable wearing experience.