Which lens type is described as being custom and thus harder to order?

Which lens type is described as being custom and thus harder to order?

• A. Gas-permeable lenses
• B. Soft contact lenses
• C. Hybrid lenses
• D. Daily disposable lenses

Answer: (A)

Gas-permeable lenses are custom-made to fit each eye. They require a fitting to determine the exact base curve, diameter, and edge design, and then are manufactured in a lab specifically for that wearer. That level of individualized fabrication makes the ordering process more involved and time-consuming compared with lenses that come in standard, stock configurations. Soft lenses, daily disposables, and even many hybrid designs are more readily available in ready-made or semi-custom options, so they’re typically quicker to order.

Gas-permeable lenses are custom-made to fit each eye. They require a fitting to determine the exact base curve, diameter, and edge design, and then are manufactured in a lab specifically for that wearer. That level of individualized fabrication makes the ordering process more involved and time-consuming compared with lenses that come in standard, stock configurations. Soft lenses, daily disposables, and even many hybrid designs are more readily available in ready-made or semi-custom options, so they’re typically quicker to order.