ABO NCLE LATEST EXAM ACTUAL 2026/2027 QUESTIONS
AND SOLUTIONS RATED A+
✔✔Prescription Irregularities - ✔✔Common issues include missing signs and
incomplete notation.
✔✔Lens Characteristics - ✔✔Factors include thickness, absorption, and index of
refraction.
✔✔Lens Types - ✔✔Includes single vision and multifocal lenses.
✔✔Aspheric Lenses - ✔✔Lenses designed to reduce distortion and thickness.
✔✔Digital Surfacing - ✔✔Advanced lens manufacturing for customized optics.
✔✔Measurement Systems - ✔✔Methods for measuring lens dimensions and power.
✔✔Usable Accommodation - ✔✔Range of vision with different lens powers.
✔✔Neutralization of Lenses - ✔✔Determining lens power using specific techniques.
✔✔Prentice's Rule - ✔✔Calculates prism induced by lens decentration.
✔✔Vertical Imbalance - ✔✔Difference in lens power between eyes vertically.
✔✔Vertex Compensation - ✔✔Adjustment for power changes at different distances.
✔✔Centration - ✔✔Alignment of optical centers in lenses.
✔✔Power in Oblique Meridians - ✔✔Lens power variation at angles to principal
meridians.
✔✔Anisometropia - ✔✔Significant power difference between two eyes.
✔✔Aniseikonia - ✔✔Difference in perceived image size between eyes.
✔✔Anterior Adnexa - ✔✔Structures surrounding the eye, including eyelids.
✔✔Aqueous Humor - ✔✔Fluid in the anterior segment of the eye.
✔✔Vitreous Humor - ✔✔Gel-like substance filling the posterior segment.
✔✔Scotoma - ✔✔Partial loss of vision in a visual field.
,✔✔Macular Degeneration - ✔✔Deterioration of the central portion of the retina.
✔✔Refractive Errors - ✔✔Impairments in focusing light on the retina.
✔✔Diplopia - ✔✔Double vision caused by muscle imbalance.
✔✔Fitting Triangle - ✔✔Concept for aligning eyewear to facial features.
✔✔Frame Parameters - ✔✔Measurements determining fit and comfort of eyewear.
✔✔Low Vision Aids - ✔✔Devices designed to assist individuals with vision impairment.
✔✔Corneal Reflex Pupilometer - ✔✔Device for measuring pupil response to light.
✔✔OSHA - ✔✔Occupational Safety and Health Administration regulations.
✔✔ANSI - ✔✔American National Standards Institute guidelines.
✔✔FDA - ✔✔Food and Drug Administration regulations for safety.
✔✔EPA - ✔✔Environmental Protection Agency standards.
✔✔HIPAA - ✔✔Health Insurance Portability and Accountability Act privacy rules.
✔✔Universal precautions - ✔✔Health safety measures to prevent infection.
✔✔CPT - ✔✔Current Procedural Terminology for coding medical services.
✔✔EMR - ✔✔Electronic Medical Records for patient data management.
✔✔Adnexa - ✔✔Structures surrounding the eye, including tear film.
✔✔Tear film - ✔✔Layered fluid protecting and lubricating the eye.
✔✔Corneal anatomy - ✔✔Layers and structure of the cornea.
✔✔Corneal physiology - ✔✔Functions including metabolism and transparency of
cornea.
✔✔Iris - ✔✔Colored part of the eye controlling pupil size.
✔✔Pupil - ✔✔Opening in the iris regulating light entry.
, ✔✔Sclera - ✔✔White outer layer of the eyeball.
✔✔Anterior chamber - ✔✔Space between cornea and iris filled with aqueous humor.
✔✔Keratoconus - ✔✔Corneal thinning causing distorted vision.
✔✔Neovascularization - ✔✔New blood vessel growth in the cornea.
✔✔Microbial keratitis - ✔✔Infection of the cornea by microorganisms.
✔✔Myopia - ✔✔Nearsightedness; difficulty seeing distant objects.
✔✔Astigmatism - ✔✔Irregular curvature of the cornea or lens.
✔✔Refraction - ✔✔Bending of light as it passes through lenses.
✔✔Keratometer - ✔✔Instrument measuring the curvature of the cornea.
✔✔Slit lamp - ✔✔Biomicroscope for detailed eye examination.
✔✔Slit lamp evaluation - ✔✔Biomicroscope assessment of eye conditions.
✔✔In-office modifications - ✔✔Adjustments like polishing lenses and tapering edges.
✔✔Radiuscope - ✔✔Instrument for measuring lens curvature.
✔✔Lensometer - ✔✔Device for verifying lens power and parameters.
✔✔Thickness gauge - ✔✔Tool for measuring lens thickness accurately.
✔✔Oxygen permeability (Dk) - ✔✔Measure of lens material's oxygen transmission.
✔✔Transmissibility (Dk/t) - ✔✔Oxygen transmission per thickness of lens.
✔✔Wetting angle - ✔✔Angle indicating lens surface's affinity for moisture.
✔✔Silicone hydrogel - ✔✔Lens material with high oxygen permeability.
✔✔Central posterior curve (CPC) - ✔✔Base curve determining lens fit on cornea.
✔✔Peripheral curves - ✔✔Curves aiding lens alignment on the eye.
AND SOLUTIONS RATED A+
✔✔Prescription Irregularities - ✔✔Common issues include missing signs and
incomplete notation.
✔✔Lens Characteristics - ✔✔Factors include thickness, absorption, and index of
refraction.
✔✔Lens Types - ✔✔Includes single vision and multifocal lenses.
✔✔Aspheric Lenses - ✔✔Lenses designed to reduce distortion and thickness.
✔✔Digital Surfacing - ✔✔Advanced lens manufacturing for customized optics.
✔✔Measurement Systems - ✔✔Methods for measuring lens dimensions and power.
✔✔Usable Accommodation - ✔✔Range of vision with different lens powers.
✔✔Neutralization of Lenses - ✔✔Determining lens power using specific techniques.
✔✔Prentice's Rule - ✔✔Calculates prism induced by lens decentration.
✔✔Vertical Imbalance - ✔✔Difference in lens power between eyes vertically.
✔✔Vertex Compensation - ✔✔Adjustment for power changes at different distances.
✔✔Centration - ✔✔Alignment of optical centers in lenses.
✔✔Power in Oblique Meridians - ✔✔Lens power variation at angles to principal
meridians.
✔✔Anisometropia - ✔✔Significant power difference between two eyes.
✔✔Aniseikonia - ✔✔Difference in perceived image size between eyes.
✔✔Anterior Adnexa - ✔✔Structures surrounding the eye, including eyelids.
✔✔Aqueous Humor - ✔✔Fluid in the anterior segment of the eye.
✔✔Vitreous Humor - ✔✔Gel-like substance filling the posterior segment.
✔✔Scotoma - ✔✔Partial loss of vision in a visual field.
,✔✔Macular Degeneration - ✔✔Deterioration of the central portion of the retina.
✔✔Refractive Errors - ✔✔Impairments in focusing light on the retina.
✔✔Diplopia - ✔✔Double vision caused by muscle imbalance.
✔✔Fitting Triangle - ✔✔Concept for aligning eyewear to facial features.
✔✔Frame Parameters - ✔✔Measurements determining fit and comfort of eyewear.
✔✔Low Vision Aids - ✔✔Devices designed to assist individuals with vision impairment.
✔✔Corneal Reflex Pupilometer - ✔✔Device for measuring pupil response to light.
✔✔OSHA - ✔✔Occupational Safety and Health Administration regulations.
✔✔ANSI - ✔✔American National Standards Institute guidelines.
✔✔FDA - ✔✔Food and Drug Administration regulations for safety.
✔✔EPA - ✔✔Environmental Protection Agency standards.
✔✔HIPAA - ✔✔Health Insurance Portability and Accountability Act privacy rules.
✔✔Universal precautions - ✔✔Health safety measures to prevent infection.
✔✔CPT - ✔✔Current Procedural Terminology for coding medical services.
✔✔EMR - ✔✔Electronic Medical Records for patient data management.
✔✔Adnexa - ✔✔Structures surrounding the eye, including tear film.
✔✔Tear film - ✔✔Layered fluid protecting and lubricating the eye.
✔✔Corneal anatomy - ✔✔Layers and structure of the cornea.
✔✔Corneal physiology - ✔✔Functions including metabolism and transparency of
cornea.
✔✔Iris - ✔✔Colored part of the eye controlling pupil size.
✔✔Pupil - ✔✔Opening in the iris regulating light entry.
, ✔✔Sclera - ✔✔White outer layer of the eyeball.
✔✔Anterior chamber - ✔✔Space between cornea and iris filled with aqueous humor.
✔✔Keratoconus - ✔✔Corneal thinning causing distorted vision.
✔✔Neovascularization - ✔✔New blood vessel growth in the cornea.
✔✔Microbial keratitis - ✔✔Infection of the cornea by microorganisms.
✔✔Myopia - ✔✔Nearsightedness; difficulty seeing distant objects.
✔✔Astigmatism - ✔✔Irregular curvature of the cornea or lens.
✔✔Refraction - ✔✔Bending of light as it passes through lenses.
✔✔Keratometer - ✔✔Instrument measuring the curvature of the cornea.
✔✔Slit lamp - ✔✔Biomicroscope for detailed eye examination.
✔✔Slit lamp evaluation - ✔✔Biomicroscope assessment of eye conditions.
✔✔In-office modifications - ✔✔Adjustments like polishing lenses and tapering edges.
✔✔Radiuscope - ✔✔Instrument for measuring lens curvature.
✔✔Lensometer - ✔✔Device for verifying lens power and parameters.
✔✔Thickness gauge - ✔✔Tool for measuring lens thickness accurately.
✔✔Oxygen permeability (Dk) - ✔✔Measure of lens material's oxygen transmission.
✔✔Transmissibility (Dk/t) - ✔✔Oxygen transmission per thickness of lens.
✔✔Wetting angle - ✔✔Angle indicating lens surface's affinity for moisture.
✔✔Silicone hydrogel - ✔✔Lens material with high oxygen permeability.
✔✔Central posterior curve (CPC) - ✔✔Base curve determining lens fit on cornea.
✔✔Peripheral curves - ✔✔Curves aiding lens alignment on the eye.
