RRB Optometrist Previous Year MCQs on Clinical Refraction
Master High-Yield RRB Optometry PYQs & Answer for CBT Success Welcome back to Smart Optometry Academy. A thorough understanding of refractive principles is essential for securing a top rank in the Railway Recruitment Board paramedical examination. This focused collection of RRB Optometrist Previous Year MCQs zeroes in on core clinical refraction topics and optical states directly mapped to the official syllabus.
Key Clinical Concepts Covered in These RRB PYQs
- Classification, orthogonal meridian separation, and anatomical sources of regular astigmatism
- Interrelationships of corneal power and axial length in emmetropic eyes
- Differentiating axial versus refractive myopia and calculating total hyperopia
- Clinical implications and management of anisometropia
- Diagnostic limitations of ophthalmophakometry in axial length measurement
- Standard optical correction strategies using concave lenses for high-prevalence conditions like myopia
Review each authentic RRB Optometry PYQs & Answer below. Every question features a concise clinical rationale designed to solidify your refraction knowledge, prevent negative marking, and boost your overall exam performance.
Practice RRB Optometrist Previous Year MCQs on “Clinical Refraction”:
Q-1: Which one of the following is not related to the classification of Astigmatism? (RRB Optometrist Previous Year MCQs 2019)
A) Regular or irregular
B) Orientation
C) With respect to refractive error
D) Axial Length
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Answer: D) Axial Length
Astigmatism classification is based on regularity, orientation, and the type of refractive error, while axial length is primarily associated with spherical errors like myopia and hyperopia. Axial length influences the overall refractive state but does not define the cylindrical nature of astigmatism.
Q-2: What is the degree of separation between the meridians having the maximum and minimum refractive powers in regular astigmatism? (RRB Optometrist Year Question & Answer 2019)
A) 45 degrees
B) 90 degrees
C) 60 degrees
D) 30 degrees
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Answer: B) 90 degrees
In regular astigmatism, the principal meridians of maximum and minimum power are oriented perpendicular to each other, exactly 90 degrees apart. This orthogonal relationship allows for precise correction with cylindrical lenses.
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Q-3: Astigmatism is most frequently produced by the toricity of the _______ surface. (RRB Optometrist Previous Year MCQs 2019)
A) Beta-2 antagonist; increases aqueous drainage
A) The Posterior Cornea
B) The Crystalline Lens
C) The Anterior Cornea
D) Optic and Visual Axis
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Answer: C) The Anterior Cornea
The anterior corneal surface has the highest refractive power (approximately 48 D) and its subtle toricity is the primary source of corneal astigmatism. Variations in its curvature along different meridians create the cylindrical refractive error.
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Q-4: The refractive myopia is associated with decreased _______. (RRB Optometrist Year Question & Answer 2019)
A) Posterior chamber depth
B) Crystalline Lens thickness
C) Anterior chamber depth
D) Radius of curvature
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Answer: D. Radius of curvature
Explanation:
Myopia occurs when the eye has too much converging power relative to its length. This excess power can come from two main structural causes:
Axial Myopia (Most Common): The eye’s refractive power is normal, but the eyeball itself is too long.
Refractive Myopia: The eye’s axial length is normal, but the optical system (cornea or lens) has too much converging power.
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Q-5: For which subject are these factors relevant? Statement (a): A factor (denoted S) determines the relationship between corneal power and axial length. Statement (b): A factor (denoted P) groups axial length, lens power, and anterior chamber depth.(RRB Optometrist Previous Year MCQs 2019)
A) Antimetropia
B) Emmetropic
C) Anisohyperopia
D) Ametropia
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Answer: B) Emmetropic
In emmetropic eyes, factors S and P describe the interrelationship between corneal power, axial length, and lens power that collectively ensure precise retinal focus. These mathematical indices help define the balanced state of emmetropia.
Q-6: The absence of refractive error is known as:(RRB Optometrist Year Question & Answer 2019)
A) Hypermetropia
B) Emmetropia
C) Myopia
D) Astigmatism
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Answer: B) Emmetropia
Emmetropia is the ideal refractive state where parallel light rays focus exactly on the retina without accommodative effort. It represents a perfectly balanced optical system requiring no corrective lenses.
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Q-7: A short axial length of the eyeball leads to which condition? (RRB Optometrist Previous Year MCQs 2019)
A) Long-sightedness
B) Emmetropia
C) Short-sightedness
D) Astigmatism
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Answer: A) Long-sightedness
A shorter axial length causes the focal point to fall behind the retina, resulting in hypermetropia, commonly known as long-sightedness. This anatomical variation requires plus-powered lenses to properly focus light onto the retina.
Q-8: The sum of latent and manifest hyperopia results in: (RRB Optometrist PYQs 2019)
A) Latent hyperopia
B) Manifest hyperopia
C) Absolute hyperopia
D) Total hyperopia
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Answer: D) Total hyperopia
Total hyperopia is the comprehensive measure of farsightedness, combining the latent component (neutralized by accommodation) and manifest component (detected without cycloplegia). This complete assessment is essential for accurate full correction.
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Q-9: What is the most common refractive error? (RRB Optometrist Previous Year MCQs 2025)
A) Cataract
B) Glaucoma
C) Presbyopia
D) Myopia
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Answer: D) Myopia
Myopia is the most prevalent refractive error globally, affecting approximately 30% of the population due to elongated axial length or excessive corneal curvature. Its increasing incidence necessitates widespread vision screening and optical correction.
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Q-10: Which refractive error requires concave lenses? (RRB Optometrist PYQs 2025)
A) Hyperopia
B) Presbyopia
C) Myopia
D) Astigmatism
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Answer: C) Myopia
Concave (minus) lenses diverge incoming light rays to shift the focal point posteriorly onto the retina, effectively correcting the excessive convergence seen in myopia. This optical principle is fundamental to myopic correction.
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B) Correct Option
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RRB Optometrist 2026
Complete Previous Year MCQs (All Subjects Solved)
Master Your Govt Job Preparation
Join our most successful flagship course on the Optometry Notes & MCQs App. Follow our proven 4-step sequence to crack the Railway Recruitment Board CBT exam.
Our Proven Success Sequence
Theory Notes
Build your foundation with subject-wise clinical & optical theory.
Premium Lectures
Deepen understanding with fundamental optometry video lectures.
Subject-wise MCQs
Test accuracy and speed by practicing topic-specific question banks.
Previous Year MCQs
Master actual CBT exam patterns with completely solved PYQs.
The RRB Optometrist recruitment conducted under the Ministry of Railways offers a prime opportunity for eye care professionals targeting a secure RRB Optometry Govt Job. Candidates preparing for an upcoming RRB Optometrist Vacancy can review the standardized eligibility norms, pay scale, and exam structure below to streamline their preparation for this sought-after RRB Optometrist govt job.
Key Job Parameters
- Post Title: Optometrist.
- Pay Scale: Level 4 of the 7th CPC Pay Matrix, featuring an initial basic pay of ₹25,500 plus applicable allowances.
- Educational Qualification: B.Sc in Optometry or a Diploma in Ophthalmic Technique/Technician (with a course duration of 3 to 4 years) from a recognized university or institution, along with valid registration with the relevant Council or Licensing body.
- Age Limit: 18 to 33/36 years, with standard category-based upper age relaxations applicable for OBC, SC, ST, PwBD, and Ex-Servicemen.
- Medical Fitness Standard: B-1 Standard, which requires sound distance and near vision along with intact colour, binocular, night, and mesopic vision. Candidates who have undergone LASIK or any other refractive surgery are not eligible for posts with the B-1 medical standard.
CBT Examination Pattern & Scheme The selection process consists of a Single-Stage Computer Based Test (CBT), followed by Document Verification (DV) and the Railway Medical Examination.
- Exam Duration and Structure: The CBT lasts for 90 minutes (120 minutes for eligible PwBD candidates using a scribe) and consists of 100 objective-type multiple-choice questions (MCQs) for a total of 100 marks.
- Marking Scheme: Each correct response earns 1 mark, with a strict negative marking deduction of 1/3 mark for every incorrect answer.
- Professional Ability (70 Marks): This core technical segment consists of 70 questions and tests optometry domains such as Physical & Visual Optics, Ocular Anatomy & Physiology, Refraction, Contact Lenses, Binocular Vision, Dispensing Optics, Optometric Instruments, and Ocular Pathology.
- General Awareness (10 Marks): Comprises 10 questions covering current affairs, history, polity, and related topics.
- General Arithmetic, Intelligence & Reasoning (10 Marks): Comprises 10 questions testing quantitative and analytical aptitude.
- General Science (10 Marks): Comprises 10 questions covering basic Physics, Chemistry, and Life Sciences.



