Community Ophthalmology — MCQs

Community Ophthalmology Indian Medical PG Practice Questions and MCQs

Question 71: Which of the following conditions has an effective control strategy to prevent blindness?

A. Conjunctivitis
B. Trachoma (Correct Answer)
C. Refractive error
D. Ocular trauma

Explanation: ***Trachoma*** - **Trachoma** is a bacterial infection caused by *Chlamydia trachomatis* that is a leading cause of preventable blindness worldwide. - The World Health Organization (WHO) promotes a highly **specific and structured strategy** called **SAFE** (Surgery, Antibiotics, Facial cleanliness, Environmental improvement) for its effective control and elimination. - SAFE is a **disease-specific control program** with clear targets for trachoma elimination as a public health problem. *Conjunctivitis* - While some severe forms of **conjunctivitis** (bacterial, viral, or allergic) can cause complications, most cases are self-limiting or easily treated. - There is no specific, structured public health control strategy comparable to SAFE for trachoma, as conjunctivitis encompasses many different etiologies with varying outcomes. *Refractive error* - **Uncorrected refractive errors** are actually the **second leading cause of visual impairment and blindness globally** after cataracts. - While WHO's **VISION 2020** initiative includes refractive error services as a key component for preventing avoidable blindness, and effective interventions exist (screening programs, affordable spectacles, refraction services), this is a **broad service delivery approach** rather than a disease-specific control strategy. - However, trachoma has a more **specific, structured, and targeted control program (SAFE)** making it the best answer in this context. *Ocular trauma* - **Ocular trauma** can cause severe and permanent vision loss or blindness, but it is an acute injury. - Prevention strategies focus on safety measures and protective eyewear, but this differs from a systematic disease control program designed to eradicate a public health burden of blindness like the SAFE strategy for trachoma.

Question 72: A person with a visual acuity of 6/60 in the right eye and 3/60 in the left eye would be categorized into which type of blindness?

A. Moderate visual impairment (Correct Answer)
B. Legal blindness
C. Normal vision
D. Low vision

Explanation: ***Moderate visual impairment*** - According to the **WHO International Classification of Diseases (ICD-11)**, moderate visual impairment is defined as visual acuity **< 6/18 to ≥ 6/60** in the better eye with best possible correction. - This patient's better eye (right eye) has a visual acuity of **6/60**, which falls at the **upper limit** of the moderate visual impairment category. - This is the standard classification used in Indian medical examinations and follows WHO guidelines. *Legal blindness* - **Legal blindness** is a **US administrative/legal term**, not a WHO classification category. It is defined as visual acuity **< 6/60 (or 20/200)** in the better eye, or visual field < 20 degrees. - Since this patient has exactly **6/60** (not less than 6/60), they do **not** meet the strict criteria for legal blindness. - This term is less commonly used in Indian medical literature, where WHO classifications are standard. *Low vision* - **Low vision** is a broad umbrella term that includes all categories of visual impairment from mild to severe, but it is not a specific classification category. - While this patient does have low vision, the more specific and appropriate classification is moderate visual impairment. *Normal vision* - **Normal vision** is defined as visual acuity of **6/6 to 6/12** in the better eye. - This patient's visual acuity of **6/60** represents significant visual impairment, far below the normal range.

Question 73: Which of the following is NOT an approach followed in revised NPCB cataract surgeries?

A. Mobile surgical camps
B. Consistent follow-up care
C. Fixed-site surgical treatment alone (excluding camps) (Correct Answer)
D. Standardized distribution of resources

Explanation: ***Fixed-site surgical treatment alone (excluding camps)*** - The revised **National Programme for Control of Blindness and Visual Impairment (NPCBVI)** adopts a **multi-pronged integrated approach** combining both fixed-site facilities and mobile outreach camps. - Relying **exclusively on fixed-site treatment** without mobile camps is **not the strategy** of the revised program, as this would limit access for rural and underserved populations. - The program emphasizes **both institutional capacity** (fixed sites at district hospitals and eye hospitals) **and community outreach** (mobile surgical camps) working together. *Mobile surgical camps* - **Mobile camps** are a crucial strategy in the revised NPCB to reach underserved populations in rural and remote areas. - They enhance **accessibility to care** and increase surgical coverage, particularly in areas without nearby fixed facilities. - Camps are conducted with **quality standards** and linked to fixed sites for follow-up care. *Consistent follow-up care* - **Comprehensive follow-up** is a cornerstone of the revised NPCB to ensure positive outcomes and address complications. - This includes **post-operative care protocols** at both camp and fixed-site surgeries to reduce morbidity. - Follow-up mechanisms help achieve the program's goal of **quality cataract surgery outcomes**. *Standardized distribution of resources* - The revised NPCB promotes **equitable and efficient allocation** of resources to ensure quality cataract services across regions. - This includes distribution of **equipment, consumables, trained personnel, and funding** based on need and surgical load. - Resource standardization helps maintain **quality benchmarks** across different service delivery models.

Practice by Chapter

Epidemiology of Ocular Diseases

Practice Questions

Preventable Blindness

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Vision 2020 and Beyond

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School Eye Health Programs

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Screening Programs

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Eye Banking and Corneal Transplantation

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Primary Eye Care

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Rehabilitation of the Visually Impaired

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Eye Health Education

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National Programs for Eye Care

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Role of Non-Governmental Organizations

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Economics of Eye Care

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Telemedicine in Ophthalmology

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