Which statement accurately describes tear film quality in relation to soft lens selection?

Which statement accurately describes tear film quality in relation to soft lens selection?

• A. It only affects the color perception of the lens
• B. Tear film quality affects comfort, deposits, and oxygen supply; dry eye may require higher Dk/t lenses or daily disposables
• C. It has no impact on lens selection
• D. It determines whether the lens can be worn with a mask

Answer: (B)

Tear film quality directly shapes how a soft lens feels and performs because it forms the wetting interface between the eyelid, tear film, and lens. A stable, healthy tear film keeps the lens surface smooth, reduces friction, and supports comfortable wear. When tear film is poor—thin, unstable, or deficient—the lens can feel dry or gritty, and deposits from tear components (proteins, lipids, mucins) can accumulate on the lens surface, causing discomfort and blurred vision. Oxygen delivery to the cornea also depends on the lens material and how much oxygen passes through it (Dk/t). If tear film quality is compromised, the cornea relies more on the lens’s oxygen transmission, so selecting a lens with higher Dk/t becomes important to maintain corneal health. In dry eye or with reduced tear turnover, opting for lenses with higher Dk/t or using daily disposables helps maintain comfort, minimize deposit buildup, and improve oxygen supply to the cornea.

Tear film quality directly shapes how a soft lens feels and performs because it forms the wetting interface between the eyelid, tear film, and lens. A stable, healthy tear film keeps the lens surface smooth, reduces friction, and supports comfortable wear. When tear film is poor—thin, unstable, or deficient—the lens can feel dry or gritty, and deposits from tear components (proteins, lipids, mucins) can accumulate on the lens surface, causing discomfort and blurred vision. Oxygen delivery to the cornea also depends on the lens material and how much oxygen passes through it (Dk/t). If tear film quality is compromised, the cornea relies more on the lens’s oxygen transmission, so selecting a lens with higher Dk/t becomes important to maintain corneal health. In dry eye or with reduced tear turnover, opting for lenses with higher Dk/t or using daily disposables helps maintain comfort, minimize deposit buildup, and improve oxygen supply to the cornea.