Contact Lens is a corrective ophthalmic device designed to sit directly on the surface of the eye to improve vision by correcting refractive errors such as myopia, hyperopia, astigmatism, and presbyopia. Available in various materials, designs, and prescriptions, contact lenses provide an alternative to traditional eyeglasses while offering a wider field of vision and greater freedom of movement. They are commonly used for vision correction and, in specialized cases, for therapeutic or cosmetic purposes.