A Contact Lens Is Made of Plastic with an Index

question 60

Multiple Choice

A contact lens is made of plastic with an index of refraction 1.50.The lens has an outer radius of curvature of + 1.65 cm and an inner radius of curvature of + 5.85 cm.What is its focal length?

• A)-4.60 cm
• B)+1.53 cm
• C)+2.57 cm
• D)+4.60 cm
• E)-2.57 cm ​

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Definitions:

Active Sexual Lifestyle

Engagement in sexual activities regularly, with the implication of having multiple sexual partners or frequent sexual relations.

Consistently Use Condoms

refers to the regular and correct use of condoms during sexual activity to reduce the risk of sexually transmitted infections and pregnancy.

Vaginal-Penile Intercourse

Sexual activity involving the insertion of the penis into the vagina.

Topical Microbicides

Substances applied to the skin or mucous membranes with the intention to prevent sexually transmitted infections by killing pathogens or blocking their entry into the body.