Nearsightedness eye

Definition of the nearsightedness eye Nearsightedness or hyperopia is an optical eye abnormality in which the eye cannot see the near point or the near point looks blurred. The average normal-eyed human has a near point of 25 cm. The cause of the nearsightedness eye Based on the previous explanation, can be concluded that the …

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Farsightedness eye

Definition of the farsightedness eye Nearsightedness or hyperopia is an optical eye abnormality in which the eye cannot see a near point clearly, or the near point looks blurred. Although it is difficult to observe a near point, people with nearsightedness can see the far point. The near point is the closest distance that can …

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Optical instrument human eye

Parts of the eye The cornea is a transparent hard membrane covering the front of the eye. The cornea refracts the beam of light entering the eye. The pupil is black parts of the eye. The pupil is black therefore absorb almost all of the light. A pupil is a hole through which light passes …

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Converging (convex) lens

Definition of the convex lens One type of lens used in everyday life is the convex lens. The convex lens is a lens with a thicker middle while the edges are thinner. Convex lenses are usually circular and made of glass so that the lens has the refractive index higher than the refractive index of …

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