The higher the tensile strength, the more durable the lens is.

• A. Higher
• B. Lower
• C. Unchanged
• D. Variable

Answer: (A)

Tensile strength is the maximum stress a material can endure when stretched before it breaks. For soft contact lenses, durability mainly means how well the lens stands up to tearing and damage during handling, insertion, removal, and cleaning. If the material has higher tensile strength, it can withstand larger forces without fracturing, so it’s less likely to tear when you pinch, pull, or flex the lens during use. This direct relationship—stronger material = better tear resistance and thus greater durability—is why the statement is true.

Note that extremely high tensile strength can affect flexibility and comfort, but in terms of basic durability under mechanical stress, higher tensile strength provides greater resilience against tearing.