Is it true that most soft CLs come in one lens diameter (OAD)?

Is it true that most soft CLs come in one lens diameter (OAD)?

• A. False
• B. Usually
• C. True
• D. Not specified

Answer: (C)

Most soft lenses are designed with a single overall diameter within a given lens line. The reason is that the fit and behavior on the eye are driven mainly by the base curve and the lens design, not by changing the diameter. A standard diameter provides predictable centration, lid interaction, and movement for the majority of eyes, while adjustments to power, material, and base curve address other fit needs. While some brands do offer alternate diameters for specialty cases, these are the exception rather than the rule. So, the statement is true: most soft CLs come in one lens diameter.

Most soft lenses are designed with a single overall diameter within a given lens line. The reason is that the fit and behavior on the eye are driven mainly by the base curve and the lens design, not by changing the diameter. A standard diameter provides predictable centration, lid interaction, and movement for the majority of eyes, while adjustments to power, material, and base curve address other fit needs. While some brands do offer alternate diameters for specialty cases, these are the exception rather than the rule. So, the statement is true: most soft CLs come in one lens diameter.