✔✔What is centration in optics? - ✔✔Centration refers to the alignment of the optical
center of the lens with the visual axis.
✔✔What are oblique meridians in lens optics? - ✔✔They are the angles at which light
enters the lens that are not aligned with the principal meridians.
✔✔What is magnification in optics? - ✔✔Magnification is the increase in the apparent
size of an object when viewed through a lens.
✔✔What is anisometropia? - ✔✔It is a condition where the two eyes have significantly
different refractive power.
✔✔What is aniseikonia? - ✔✔It is a condition where there is a difference in the
perceived size of images between the two eyes.
✔✔What are the components of the anterior segment of the eye? - ✔✔The anterior
segment includes the sclera, cornea, iris, pupil, and aqueous humor.
✔✔What is glaucoma? - ✔✔Glaucoma is a condition characterized by increased
intraocular pressure that can damage the optic nerve.
✔✔What is macular degeneration? - ✔✔Macular degeneration is a disease that leads to
loss of vision in the center of the visual field due to damage to the retina.
✔✔What is a scotoma? - ✔✔A scotoma is an area of partial or complete loss of vision
surrounded by a field of normal vision.
✔✔What are the common refractive errors? - ✔✔Common refractive errors include
myopia, hyperopia, presbyopia, and astigmatism.