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Why are concave lens used in spectacles?
Because they alter the focus of the lens in the patients eye, to correct their vision.
What are the different types of lenses?
convex and concave are two types of lenses that are used to correct defects in vision.
What causes light rays passing through it to diverge?
double concave lens
What causes light rays passing through it to refract?
double concave lens
Why cannot the lenses in eyes be concave in shape?
BECAUSE YOUR EYES ARE SHAPED CONVEX LIKE MEANING THEY CURVE OUTWARD BUT IF THEY WERE TO BE CONCAVE YOUR VISION WOULD BE BLURRED AND WOULD DAMAGE EVERYTHING IN YOUR EYES LIKE THE PUPIL AN CORNEA
What causes concave nails?
anemia
What type of lenses help correct vision problems?
Concave and Convex
What are the two types of vision?
Convex and Concave are the two types of lenses.
What is a convex and a concave lens?
CONCAVE LENS : lens that atleast possess one end inwards is called as concave lens. CONVEX LENS : lens that atleast possess one end outwards like the exterior of the sphere is called convex lens. According to the medical values convex lens are used for long sight vision problem and concave lens for short sight vision problems.
What are the different types of lenses?
convex and concave are two types of lenses that are used to correct defects in vision.
Why are concave lens used in spectacles?
Because they alter the focus of the lens in the patients eye, to correct their vision.
What causes vision changes?
Diabetes causes rapid vision change,retina changes are big problem (NPDR)
Which vitamin causes night vision?
Vitamin A is necessary for night vision.
What causes light rays passing through it to refract?
double concave lens
What causes light rays passing through it to diverge?
double concave lens
What causes rapid vision change?
diabetes causes rapid vision change,retina changes are big problem (NPDR)
What are eyeglass?
What are eyeglasses? They are lenses, either concave or convex, within a frame and they are worn on your face upon your nose if you have unclear vision.
