Vision Defects and Eye Conditions

The SAFE strategy is a comprehensive approach for trachoma control: Surgery for advanced disease, Antibiotics (azithromycin) for active infection, Facial cleanliness to prevent transmission, and Environmental improvement (water, sanitation). It is NOT used for glaucoma, diabetic retinopathy, or cataract.

IOL (Intraocular Lens) is the standard lens implanted during cataract surgery to replace the clouded natural lens. Alfa, Ether, and Neal are not types of lenses used in ophthalmology. The IOL restores clear vision by focusing light onto the retina after cataract removal.

1. Nearsightedness

Myopia is due to elongation of the eye ball.

Astigmatism is a vision defect caused by an irregular curvature of the cornea or lens, preventing light from focusing properly on the retina. This results in blurred vision where lines in different orientations (horizontal vs vertical) cannot be seen clearly at the same time.

Astigmatism is a common vision condition caused by an irregular curvature of the cornea or lens, which prevents light from focusing properly on the retina. This results in blurred or distorted vision at all distances.

Myopia, or nearsightedness, is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry. It occurs when the shape of your eye causes light rays to bend incorrectly, focusing images in front of your retina.

A cataract is a medical condition in which the natural lens of the eye becomes progressively opaque, resulting in blurred vision. Myopia refers to nearsightedness, while glaucoma involves damage to the optic nerve usually due to high pressure.

Myopia is a condition affecting the eyes. Similarly, pyorrhoea is a condition affecting the teeth and gums.

Hypermetropia, or long-sightedness, is a condition where a person can see distant objects clearly but has difficulty focusing on near objects. Since the person cannot see objects nearer than 75 cm, they are suffering from hypermetropia.

The episclera is a thin layer of tissue that lies between the conjunctiva and the connective tissue layer that forms the white of the eye. Episcleritis is a benign and self-limiting inflammatory disease that affects the episclera.

Ophthalmopathy due to thyrotoxicosis does not involve the uveal tract.

Astigmatism is a common vision condition that causes blurred vision due to an irregularly shaped cornea or lens.

Astigmatism is a common vision condition caused by an irregularly shaped cornea or lens, which is corrected using cylindrical lenses.

Glaucoma is a disease that damages your eye's optic nerve. It usually happens when fluid builds up in the front part of your eye. That extra fluid increases the pressure in your eye, damaging the optic nerve.