Full Form of FRIEND and STUDENT Acronyms

Study Notes

FRIEND is an acronym that stands for Foundation of Trust, Reciprocal Respect, Interconnectedness, Empathy and Empowerment, Non-judgmental Nature, Devotion and Dedication
STUDENT is an acronym that stands for Smart Thoughtful Understanding Disciplined Energetic Notable Talented Person

The eye has several layers: cornea (transparent outer layer), iris (colored part controlling light entry), pupil (opening regulating light), lens (flexible, transparent structure for focusing light), retina (innermost layer sensing light), macula (central area for central vision), and optic nerve (carries signals to the brain).

Light refraction occurs when light passes through the cornea and lens, bending to focus on the retina.
Accommodation allows the lens to change shape for focusing on objects at different distances.
Iris control regulates light entry through the pupil, controlling the amount of light entering the eye.
Visual acuity refers to the sharpness of vision, dependent on the eye's ability to focus and detect light.

Saccadic movement involves rapid, jerky movements between fixation points, allowing the eye to quickly scan a scene.
Pursuit movement is a smooth, continuous movement to track moving objects.
Vergence movement enables the eyes to move inward or outward to focus on objects at different distances.

Myopia (nearsightedness) makes it difficult to see distant objects clearly due to an elongated eyeball or steep cornea.
Hyperopia (farsightedness) makes it difficult to see close objects clearly due to a shortened eyeball or flat cornea.
Cataracts are a clouding of the lens that impairs vision, often caused by age or injury.
Glaucoma results from increased pressure in the eye damaging the optic nerve, potentially leading to blindness.
Macular degeneration is a condition where the macula is damaged, impairing central vision and daily activities.