OPTICIAN MAIN EXAMINATION 2026 SET QUESTIONS AND
SOLUTIONS RATED A+
✔✔tear film - ✔✔protects outer layer of eye from irritants, gives nutrition to cornea
✔✔Aqueous layer - ✔✔thickest layer that has water, salts, and protein for cornea
✔✔mucin layer - ✔✔thinnest layer that helps aqueous layer to spread evenly over the
eye
✔✔lipid layer - ✔✔outermost layer, prevents evaporation of aqueous layer
✔✔Crystalline Lens - ✔✔refractive index of 1.42, held by small fibers (ligaments,
ciliary,body and muscles), brings rays of light into focus on the retina
✔✔Pupil - ✔✔light rays enter here, dilates (expands) or contracts (constricts)
✔✔Iris - ✔✔controls the size of the pupil, colored part of the eye
✔✔Sclera - ✔✔White part of the eye
✔✔Vitreous Chamber - ✔✔A refraction index of 1.33, filled with vitreous humor (a gel),
between crystalline lens and retina
✔✔Anterior Chamber - ✔✔Area between cornea/ iris (pupil), refractive index of 1.33
✔✔Retina - ✔✔in the back of the eye, brings objects into focus
✔✔Posterior Chamber - ✔✔area between pupil and crystalline lens, refractive index of
1.33
✔✔Optic Nerve - ✔✔blind spot (optic disc), projects image onto retina
✔✔Cornea - ✔✔refractive index of 1.37, clear window that covers iris and pupil,
provides 2/3 of eyes focusing ability, 43 D/ mm thick, no blood vessels; receives
nutrition and oxygen from the tear film
✔✔Conjuctiva - ✔✔thin/transparent, moisten the eye
✔✔Orbit - ✔✔Bony socket that surrounds the eye
✔✔Globe - ✔✔24mm in diameters front to back, proper tern for eyeball
, ✔✔Minus Sphere and RX - ✔✔Corrects myopia, concave, minifies objects, thinner in
the center, thicker on the edge
✔✔Plus sphere and RX - ✔✔corrects hyperopia, convex, magnifies the size of objects,
thicker in the center
✔✔UVC - ✔✔what is the most harmful wavelength
✔✔300-380nm - ✔✔what wavelength contributes to cataracts
✔✔accomodation - ✔✔the ability of the eye to focus objects at varying distances is
✔✔canthus - ✔✔the corner of the eye where the upper and lower limbs meet is
✔✔Drooping eyelid - ✔✔a ptosis crutch is used to correct
✔✔Plus/minus 14 degrees - ✔✔The ANSI cylinder tolerance for a -.25 cylinder
✔✔slab off - ✔✔bicentric grinding is synonymous for
✔✔blepharitis - ✔✔a condition that describes inflammation of the eyelid margins is
called
✔✔plus - ✔✔a reverse slab off should be applied to the lens with the most
✔✔green glass lens - ✔✔the best absorber of infrared radiation is a
✔✔lensometer - ✔✔what instrument verifies slab off
✔✔upper eye lid - ✔✔a ptosis crutch is used to give support to the
✔✔meniscus lens - ✔✔a lens that is crescent-shaped with one of the sides measuring a
6 diopter radius is known as
✔✔less oblique astigmatism - ✔✔corrected curve lenses have
✔✔3mm - ✔✔a minimum Center thickness for a minus industrial lens according to Z87
standards is
✔✔executive bifocal - ✔✔what bifocals offer the widest Reading area
✔✔1.53 - ✔✔the refractive index to which Optical tools and gauges are calibrated is
SOLUTIONS RATED A+
✔✔tear film - ✔✔protects outer layer of eye from irritants, gives nutrition to cornea
✔✔Aqueous layer - ✔✔thickest layer that has water, salts, and protein for cornea
✔✔mucin layer - ✔✔thinnest layer that helps aqueous layer to spread evenly over the
eye
✔✔lipid layer - ✔✔outermost layer, prevents evaporation of aqueous layer
✔✔Crystalline Lens - ✔✔refractive index of 1.42, held by small fibers (ligaments,
ciliary,body and muscles), brings rays of light into focus on the retina
✔✔Pupil - ✔✔light rays enter here, dilates (expands) or contracts (constricts)
✔✔Iris - ✔✔controls the size of the pupil, colored part of the eye
✔✔Sclera - ✔✔White part of the eye
✔✔Vitreous Chamber - ✔✔A refraction index of 1.33, filled with vitreous humor (a gel),
between crystalline lens and retina
✔✔Anterior Chamber - ✔✔Area between cornea/ iris (pupil), refractive index of 1.33
✔✔Retina - ✔✔in the back of the eye, brings objects into focus
✔✔Posterior Chamber - ✔✔area between pupil and crystalline lens, refractive index of
1.33
✔✔Optic Nerve - ✔✔blind spot (optic disc), projects image onto retina
✔✔Cornea - ✔✔refractive index of 1.37, clear window that covers iris and pupil,
provides 2/3 of eyes focusing ability, 43 D/ mm thick, no blood vessels; receives
nutrition and oxygen from the tear film
✔✔Conjuctiva - ✔✔thin/transparent, moisten the eye
✔✔Orbit - ✔✔Bony socket that surrounds the eye
✔✔Globe - ✔✔24mm in diameters front to back, proper tern for eyeball
, ✔✔Minus Sphere and RX - ✔✔Corrects myopia, concave, minifies objects, thinner in
the center, thicker on the edge
✔✔Plus sphere and RX - ✔✔corrects hyperopia, convex, magnifies the size of objects,
thicker in the center
✔✔UVC - ✔✔what is the most harmful wavelength
✔✔300-380nm - ✔✔what wavelength contributes to cataracts
✔✔accomodation - ✔✔the ability of the eye to focus objects at varying distances is
✔✔canthus - ✔✔the corner of the eye where the upper and lower limbs meet is
✔✔Drooping eyelid - ✔✔a ptosis crutch is used to correct
✔✔Plus/minus 14 degrees - ✔✔The ANSI cylinder tolerance for a -.25 cylinder
✔✔slab off - ✔✔bicentric grinding is synonymous for
✔✔blepharitis - ✔✔a condition that describes inflammation of the eyelid margins is
called
✔✔plus - ✔✔a reverse slab off should be applied to the lens with the most
✔✔green glass lens - ✔✔the best absorber of infrared radiation is a
✔✔lensometer - ✔✔what instrument verifies slab off
✔✔upper eye lid - ✔✔a ptosis crutch is used to give support to the
✔✔meniscus lens - ✔✔a lens that is crescent-shaped with one of the sides measuring a
6 diopter radius is known as
✔✔less oblique astigmatism - ✔✔corrected curve lenses have
✔✔3mm - ✔✔a minimum Center thickness for a minus industrial lens according to Z87
standards is
✔✔executive bifocal - ✔✔what bifocals offer the widest Reading area
✔✔1.53 - ✔✔the refractive index to which Optical tools and gauges are calibrated is
