Convex lenses are used to correct:
a) short sight
b) long sight
c) both short and long sights
d) to correct vision angle
Convex lenses are used to correct both short-sightedness (myopia) and long-sightedness (hypermetropia). Short-sightedness occurs when the eye focuses light in front of the retina, resulting in distant objects appearing blurry. Long-sightedness, on the other hand, occurs when the eye focuses light behind the retina, leading to difficulty in focusing on nearby objects.
To correct vision using a convex lens, you need to understand its properties. A convex lens is thicker in the middle and thinner at the edges. When light passes through a convex lens, it refracts (bends) the light rays inward, allowing the rays to focus on the retina. This process adjusts the focal length of the eye lens and corrects the focusing issues associated with short-sightedness and long-sightedness.
If you suspect you have either short-sightedness or long-sightedness, it is important to consult with an optometrist or ophthalmologist who can conduct an eye examination and prescribe the appropriate corrective lenses, such as convex lenses, to improve your vision.