What is the result of increasing total diameter on a contact lens?

Increasing the total diameter of a contact lens influences several aspects of how the lens interacts with the eye. A larger diameter typically results in a tighter fit. This is primarily because a wider lens covers more of the eye's surface area, leading to an increased area of contact between the lens and the cornea. This broader contact area can reduce the overall mobility of the lens, making it sit more snugly against the eye, which may be desired in specific fitting situations.

In contrast, smaller diameters can allow for more lens movement, which is sometimes beneficial for tear exchange or comfort, depending on the individual’s needs. However, an increase in diameter often prioritizes stability and a secure fit over mobility, making a tighter fit the notable outcome.

The other options suggest outcomes that do not directly stem from increasing diameter. Comfort may not necessarily improve with just an increased diameter; lens movement is more likely to decrease than to tighten the fit in the traditional sense of lens movement; and while the weight of a lens can change slightly with materials, a larger diameter does not inherently make it heavier.