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level: Level 1 of Lens

Questions and Answers List

level questions: Level 1 of Lens

QuestionAnswer
It is a transparent piece of glass or plastic with at least one curved surfaceLens
What is the latin term for a lens?Lentil
A type of seed used in cookingLentil
Convex lens is also known asConverging lens
Concave lens is also known asDiverging lens
Positive lensConvex lens
Negative lensConcave lens
The convex lens is composed of infinite number of prisms positioned ____Base to base
Concave lens is composed of infinite number of prisms positioned ____Apex to apex
It is thicker across the middle and thinner at its edgesConverging lens
It is thinner across the middle and thicker at its edgesDiverging lens
In convex lens, two prisms placed _____ can bring two rays of light, originally parallel to a focusBase to base
In concave lens, two prisms placed _____ refract light in a diverging mannerApex to apex
It is suitable for patients with complex refractive errors including high spere, cylindrical power, special parameters, extreme powers, and extreme prismsSpecialty lenses
It helps address vision challenges for people with medical issues such as lazy eye, cataracts, and other rare eye conditionsSpecialty lenses
Have single power or one range of visionSingle Vision lens
Most common type of prescription lensSingle Vision lens
Used for reading glasses to correct presbyopia (trouble focusing on objects at a close rangeSingle Vision lens
A bifocal lensDouble Vision lens
Created with two different areas of vision correctionDouble Vision lens
The top portion of the double vision lens is used for _____Distance
The bottom portion of the double vision lens is used for___closer vision or near
Provide range of vision from distant to near, all without a line across the lensProgressive lenses
Have multiple vision distances, including intermediate (for computer usage)Progressive lenses
These are lenses which are designed to be suited in certain hobbies or jobs. Glasses that have these lenses are also known as special-purpose glasses or eyewear and they are not made for everyday wear.Specialty lenses
It reduces glare and reflections from all light sourcesAnti-reflection lenses
When exposed to light, the photochromic molecules in lenses begin to change structure absorbing more light and eventually darkening the lenses.Photochromic lenses
It changes the orientation of the reflected waves of sunlightPolarization
The horizontal waves absorb which reduces the glarePolarized lenses
Blue light filter lenses is also known asHigh Energy Visible (HEV)
Can penetrates deep into the eye, resulting damage to the retina (exposing the eye to hidden spikes intensity)Blue light
It is the most commonly used material for eyeglassesPolycarbonate lenses
Recommended for prescriptions ranging from: +/- 2.00 to +/- 4.00Polycarbonate lenses