TEXAS OPTOMETRIST LICENSING EXAM – PRACTICE TEST
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
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1. Which structure is primarily responsible for refracting light in the eye?
A. Lens
B. Cornea
C. Retina
D. Vitreous body
The cornea provides the majority of the eye’s refractive power, although the
lens fine-tunes it.
2. A patient with hyperopia needs correction using:
A. Concave lenses
B. Convex lenses
C. Cylindrical lenses
D. Plano lenses
Hyperopia (farsightedness) is corrected with convex lenses that converge
light rays.
3. Which cranial nerve innervates the lateral rectus muscle?
A. CN III
B. CN V
C. CN VI
D. CN IV
The abducens nerve (CN VI) controls the lateral rectus muscle, allowing
abduction of the eye.
,4. The primary purpose of cycloplegic drugs in refraction is to:
A. Reduce intraocular pressure
B. Paralyze accommodation
C. Dilate retinal vessels
D. Treat corneal infections
Cycloplegics prevent accommodation to allow accurate refraction, especially
in children.
5. Tonometry is used to measure:
A. Tear production
B. Corneal curvature
C. Intraocular pressure
D. Retinal thickness
Tonometry estimates intraocular pressure, key in diagnosing and managing
glaucoma.
6. A hallmark symptom of keratoconus is:
A. Floaters
B. Irregular astigmatism
C. Diplopia
D. Central scotoma
Keratoconus leads to progressive thinning of the cornea and irregular
astigmatism.
7. The legal definition of optometry in Texas allows:
A. Performing cataract surgery
B. Prescribing corrective lenses
C. Performing LASIK
D. Retinal detachment repair
Optometrists in Texas diagnose, manage, and correct vision problems but do
not perform major surgeries.
8. The near point of accommodation normally recedes with:
A. Myopia
B. Age (Presbyopia)
, C. Hyperopia
D. Astigmatism
Presbyopia is the age-related loss of accommodation due to lens rigidity.
9. A patient has an intraocular pressure of 28 mmHg. This is most consistent
with:
A. Normal findings
B. Glaucoma risk
C. Corneal abrasion
D. Cataract
Normal IOP is 10–21 mmHg; elevated pressure suggests risk for glaucoma.
10. What is the standard visual acuity for legal driving in Texas (without
corrective lenses)?
A. 20/100
B. 20/70
C. 20/40
D. 20/20
Texas requires at least 20/40 vision in one eye for a driver’s license.
11. The Snellen chart primarily measures:
A. Visual acuity
B. Contrast sensitivity
C. Depth perception
D. Color vision
The Snellen chart measures central visual acuity at a set distance.
12. Ishihara plates are used to test:
A. Visual acuity
B. Color vision
C. Binocular vision
D. Visual fields
Ishihara plates detect red-green color deficiencies.
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
1. Which structure is primarily responsible for refracting light in the eye?
A. Lens
B. Cornea
C. Retina
D. Vitreous body
The cornea provides the majority of the eye’s refractive power, although the
lens fine-tunes it.
2. A patient with hyperopia needs correction using:
A. Concave lenses
B. Convex lenses
C. Cylindrical lenses
D. Plano lenses
Hyperopia (farsightedness) is corrected with convex lenses that converge
light rays.
3. Which cranial nerve innervates the lateral rectus muscle?
A. CN III
B. CN V
C. CN VI
D. CN IV
The abducens nerve (CN VI) controls the lateral rectus muscle, allowing
abduction of the eye.
,4. The primary purpose of cycloplegic drugs in refraction is to:
A. Reduce intraocular pressure
B. Paralyze accommodation
C. Dilate retinal vessels
D. Treat corneal infections
Cycloplegics prevent accommodation to allow accurate refraction, especially
in children.
5. Tonometry is used to measure:
A. Tear production
B. Corneal curvature
C. Intraocular pressure
D. Retinal thickness
Tonometry estimates intraocular pressure, key in diagnosing and managing
glaucoma.
6. A hallmark symptom of keratoconus is:
A. Floaters
B. Irregular astigmatism
C. Diplopia
D. Central scotoma
Keratoconus leads to progressive thinning of the cornea and irregular
astigmatism.
7. The legal definition of optometry in Texas allows:
A. Performing cataract surgery
B. Prescribing corrective lenses
C. Performing LASIK
D. Retinal detachment repair
Optometrists in Texas diagnose, manage, and correct vision problems but do
not perform major surgeries.
8. The near point of accommodation normally recedes with:
A. Myopia
B. Age (Presbyopia)
, C. Hyperopia
D. Astigmatism
Presbyopia is the age-related loss of accommodation due to lens rigidity.
9. A patient has an intraocular pressure of 28 mmHg. This is most consistent
with:
A. Normal findings
B. Glaucoma risk
C. Corneal abrasion
D. Cataract
Normal IOP is 10–21 mmHg; elevated pressure suggests risk for glaucoma.
10. What is the standard visual acuity for legal driving in Texas (without
corrective lenses)?
A. 20/100
B. 20/70
C. 20/40
D. 20/20
Texas requires at least 20/40 vision in one eye for a driver’s license.
11. The Snellen chart primarily measures:
A. Visual acuity
B. Contrast sensitivity
C. Depth perception
D. Color vision
The Snellen chart measures central visual acuity at a set distance.
12. Ishihara plates are used to test:
A. Visual acuity
B. Color vision
C. Binocular vision
D. Visual fields
Ishihara plates detect red-green color deficiencies.
