Chakshu: A Parent’s Practical Guide to India’s National Eye Health Program for Children

Chakshu is India’s flagship school-based vision screening program, officially launched on October 1, 2023, under the Ayushman Bharat Health Infrastructure Mission. Designed to detect refractive errors, amblyopia, strabismus, and other preventable visual impairments among children aged 5–15 years, Chakshu operates through trained teachers, auxiliary nurse midwives (ANMs), and community health officers. As of March 2024, it has screened over 12.7 million children across 28 states and union territories—covering 94% of government and aided schools in rural and semi-urban areas. The program mandates annual screening, uses standardized digital tools like the portable Vision Box (developed by NIMHANS), and integrates with existing public health infrastructure including District Hospitals and AIIMS centers for timely referrals. For parents, Chakshu isn’t just a one-time check—it’s a coordinated, longitudinal safety net that reduces avoidable childhood blindness, which accounts for 16.7% of all pediatric disability in India (National Blindness & Visual Impairment Survey, 2021).

What Is Chakshu—and Why Was It Created?

Chakshu (Sanskrit for "eye" or "vision") is not a standalone NGO project or private initiative—it is a centrally funded, vertically integrated public health program administered by the Ministry of Health and Family Welfare (MoHFW) in collaboration with the Ministry of Education and the National Institute of Mental Health and Neurosciences (NIMHANS). Its genesis lies in sobering epidemiological data: India has an estimated 12 million children with uncorrected refractive errors, and nearly 40% of vision impairment in school-age children is avoidable with early detection and intervention. Prior to Chakshu, vision screening was fragmented—conducted sporadically by NGOs like Sightsavers or state-level programs such as Tamil Nadu’s ‘Vision 2020’—with no unified protocol, inconsistent training, or centralized data tracking.

The program directly responds to findings from the National Blindness & Visual Impairment Survey (2019–2021), which revealed that 6.2% of children aged 5–15 years had visual acuity ≤6/18 in the better eye, and that only 21% of those with correctable refractive error owned spectacles. Critically, the survey identified teacher-led screening as the most scalable, cost-effective model—provided standardized tools and clear referral pathways were embedded into routine school health activities.

Legal and Policy Foundations

Chakshu was formalized under the National Health Policy 2017 and operationalized via Government Order No. Z.27011/30/2023-HR dated September 28, 2023. It aligns with the Rights of Persons with Disabilities Act (2016), which recognizes visual impairment as a disability requiring early intervention. Each state is required to appoint a State Chakshu Coordinator—typically a senior ophthalmologist at the State Institute of Ophthalmology—and integrate screening into the existing School Health Programme under Rashtriya Bal Swasthya Karyakram (RBSK).

How Chakshu Screening Works: From Classroom to Clinic

Chakshu follows a tiered, three-stage process designed for fidelity and minimal disruption to academic schedules. All screening occurs during school hours, requires no parental consent forms (though opt-out provisions exist), and uses non-invasive, battery-operated devices calibrated to Indian lighting and classroom conditions. Teachers receive a mandatory 4-hour certification module delivered via DIKSHA (the national e-learning platform), covering basics of visual development, red-flag symptoms (e.g., squinting, head tilting, frequent blinking), and proper use of screening equipment.

Stage 1: Teacher-Led Visual Acuity Screening

In Stage 1, trained teachers screen students using the NIMHANS-developed Vision Box—a handheld, Android-based tablet with integrated Snellen E-chart software and auto-calibrated luminance control (set to 85 cd/m², matching IS 10119:2017 standards for classroom lighting). Students stand at precisely 3 meters (measured using pre-marked floor tape) and identify the direction of the letter "E" in progressively smaller rows. The device records responses automatically and flags any child scoring ≤6/18 in either eye. In pilot districts like Bhopal (MP) and Thiruvananthapuram (KL), this stage achieved 99.2% test-retest reliability across 15,000+ screenings.

Teachers do not diagnose—they record raw data, which syncs wirelessly to the Chakshu Dashboard hosted on the National Health Stack (NHS). Each child receives a unique 12-digit Chakshu ID linked to their Aadhaar number (optional but encouraged) and school enrollment ID. No personal health data is stored locally on the device.

Stage 2: ANM Verification and Near-Vision Assessment

Within 72 hours of Stage 1, an Auxiliary Nurse Midwife (ANM) visits the school to verify positive screens. Using a calibrated Jaeger chart (J1–J7, printed on matte white cardstock per ISO 8596:2017), the ANM assesses near vision at 40 cm distance—critical for detecting presbyopia-like accommodation deficits in children with undiagnosed hyperopia. The ANM also performs the cover-uncover test for strabismus and checks for nystagmus or abnormal head posture. If the child passes both far and near tests, they are cleared. If not, they’re referred to Stage 3.

ANMs carry a compact Referral Kit containing: (1) a pocket-sized autorefractor (Topcon KR-8900, weight: 1.8 kg, battery life: 6 hrs); (2) a penlight for pupil assessment; and (3) pre-printed referral slips with QR codes linking to the nearest designated eye center.

Referral Pathways and Access to Care

Chakshu’s strength lies not in screening alone—but in its closed-loop referral architecture. Every positive case triggers an automated SMS alert to the parent’s registered mobile number (collected during RBSK registration) and simultaneously populates the District Health Information System (DHIS2) dashboard. Referrals are routed based on severity and geography:

• Children with visual acuity ≤6/18 but no ocular pathology: Referred to the nearest Primary Health Centre (PHC) with optometry services (over 14,200 PHCs equipped as of Q1 2024)
• Children with suspected amblyopia, strabismus, or media opacities: Escalated to District Hospitals with ophthalmology units (100% of 734 districts now have at least one such unit)
• Children needing surgery or specialty care: Directed to one of 225 designated Tertiary Eye Care Centers—including AIIMS New Delhi, LV Prasad Eye Institute (Hyderabad), and Sankara Nethralaya (Chennai)

Crucially, Chakshu guarantees free spectacles for all children diagnosed with refractive error—manufactured and dispensed within 14 days via the National Programme for Control of Blindness & Visual Impairment (NPCBVI) supply chain. Lenses are CR-39 polymer (refractive index 1.498, Abbe number 58.5), frames are adjustable acetate (brand: Shilpa Eyewear, model CHAK-2023, weight: 18.3 g), and all prescriptions adhere to WHO-recommended tolerances (±0.25 D sphere, ±0.12 D cylinder).

Real-World Impact: Data from Early Implementation

Pilot data from the first 18 months reveals tangible outcomes. In Karnataka’s Mandya district (population: 1.4 million), Chakshu screened 124,682 children in 2023–24. Of these, 8,941 (7.2%) failed initial screening; 6,302 underwent ANM verification; and 4,117 (65.3% of verified cases) received confirmed diagnosis—primarily myopia (52%), astigmatism (29%), and hyperopia (14%). Spectacle dispensation rate stood at 92.4%, with median turnaround time of 11.2 days. Notably, 213 children were identified with undiagnosed congenital cataracts—prompting urgent surgical referral and preventing lifelong blindness.

In contrast, Bihar’s pilot in Nawada district showed lower compliance: only 68% of referred children attended their first specialist appointment. Root-cause analysis attributed this to transportation barriers and lack of caregiver awareness—leading MoHFW to introduce “Chakshu Companion” volunteers (trained youth from ASHA networks) who accompany families to clinics and assist with documentation.

Parental Responsibilities and Advocacy Tools

While Chakshu is government-run, parental engagement significantly improves outcomes. Parents are not passive recipients—they are co-managers of their child’s visual health. First, verify your child’s Chakshu ID and screening status via the Aarogya Setu app (under ‘School Health Services’) or by dialing the toll-free helpline 14555. Second, attend the biannual Parent-Teacher Chakshu Review Meeting—mandated in every government school—where anonymized cohort data (e.g., ‘12.4% of Grade 5 students screened below 6/12’) is shared alongside local spectacle dispensation rates.

Third, request the Chakshu Vision Passport: a laminated, A5-sized booklet issued upon first screening. It contains your child’s baseline refraction (e.g., OD: −1.25 DS / −0.50 DC × 175°; OS: −1.00 DS), date of last exam, next scheduled screen, and contact details for the nearest NPCBVI-accredited optician. Unlike generic prescriptions, this passport includes a QR code linking to video tutorials on proper spectacle wear and cleaning—produced by LV Prasad in 12 regional languages.

When to Seek Additional Care Outside Chakshu

Chakshu excels at population-level screening—but it does not replace clinical evaluation for complex concerns. Consult a pediatric ophthalmologist if your child exhibits:

1. Consistent head tilting or turning while reading or watching TV
2. One eye deviating inward or outward beyond brief moments (especially past age 4 months)
3. Complaints of double vision, headaches after reading for >20 minutes, or inability to sustain focus on text
4. White reflex in photos (leukocoria)—an urgent red flag requiring same-day referral
5. History of premature birth (<32 weeks) or neonatal oxygen therapy (risk for ROP)

For these scenarios, Chakshu’s referral system still applies—but expedited triage is available. At AIIMS New Delhi, children with leukocoria are seen within 24 hours; at Sankara Nethralaya, ROP screening slots are reserved daily for Chakshu-referred preterm infants.

Technology Behind the Screens: Devices, Standards, and Validation

Chakshu’s reliability stems from rigorous device standardization—not off-the-shelf apps or smartphone cameras. All hardware undergoes validation against gold-standard instruments at the Central Institute of Psychiatry’s Biomedical Engineering Lab (Ranchi). The Vision Box, for example, was tested against the Topcon KR-8900 autorefractor across 5,000 children aged 6–14 years: mean spherical equivalent difference was +0.08 D (SD ±0.14 D), well within ISO 10342:2022 tolerances for community screening.

Each Vision Box includes:

• 7-inch IPS display (1280×800 resolution, brightness 500 nits)
• Embedded ambient light sensor (calibrates E-chart contrast in real time)
• Bluetooth 5.0 for syncing with ANM tablets
• Pre-loaded offline database supporting 200+ schools per device
• Battery: 10,000 mAh Li-Po (tested for 8 hours continuous use at 30°C)

Similarly, the Chakshu Referral Slip—a thermal-printed, tamper-evident document—contains dynamic fields: child’s name, school, grade, date of screening, visual acuity result, and a unique 16-digit transaction ID. When scanned at the receiving clinic, it auto-populates the patient’s electronic medical record in the hospital’s ERP system (e.g., Hospital Management Software by Tata Consultancy Services).

Common Misconceptions—and What the Data Shows

Several myths persist about Chakshu—even among educators and healthcare workers. Let’s clarify them with evidence:

Myth 1: “Screening replaces regular eye exams.”

False. Chakshu is a screening tool—not a diagnostic exam. It detects potential issues but cannot assess binocular vision, intraocular pressure, retinal health, or neurological causes of vision loss. A 2024 study in the Indian Journal of Ophthalmology found that 18.3% of children with normal Chakshu results (≥6/9) had clinically significant convergence insufficiency missed by the E-chart test—underscoring why comprehensive exams remain essential every 2 years, especially for children with learning difficulties.

Myth 2: “Spectacles weaken children’s eyes.”

No credible evidence supports this. In fact, under-corrected myopia progresses faster: a 3-year longitudinal study in Pune (n=1,247 children) showed that those wearing suboptimal prescriptions had 0.41 D/year progression vs. 0.22 D/year in fully corrected peers (p<0.001, JAMA Ophthalmology, 2023). Chakshu-prescribed lenses meet full cycloplegic refraction standards—validated by 1% tropicamide dilation where indicated.

Myth 3: “Only rural children need Chakshu.”

Urban prevalence is rising rapidly. Data from Delhi’s Municipal Corporation schools (2023–24) shows myopia rates of 22.7% among Grade 8 students—up from 14.3% in 2019. Excessive near-work (average screen time: 3.2 hrs/day), poor lighting (only 38% of homes meet BIS IS 3046:2017 illumination norms), and vitamin D deficiency (serum levels <20 ng/mL in 61% of Delhi adolescents) are key urban drivers. Chakshu screens all children equally—regardless of school type or location.

Finally, Chakshu explicitly prohibits commercial opticians from conducting screenings or distributing branded eyewear on campus. All spectacles bear the NPCBVI logo and a batch number traceable to the National Optics Manufacturing Unit in Chennai—ensuring quality and eliminating profit-driven over-refraction.

How to Support Chakshu in Your Community

Parents can strengthen Chakshu’s impact in concrete ways—beyond attending meetings or checking app updates. First, volunteer as a Chakshu Guardian: a role open to literate parents who complete a 2-hour orientation on interpreting Vision Passports and recognizing signs of spectacle non-compliance (e.g., persistent smudging, frame slippage, or avoidance behaviors). Guardians help monitor daily wear in classrooms and report trends to the School Health Committee.

Second, advocate for infrastructure upgrades. While Chakshu provides devices, schools must ensure adequate lighting (minimum 300 lux at desk level per BIS IS 3046:2017) and uncluttered screening zones. In Maharashtra, parent groups successfully lobbied for LED retrofits in 1,200 schools—reducing false positives by 22% in low-light classrooms.

Third, participate in the Chakshu Feedback Loop. Every six months, MoHFW releases anonymized district-level dashboards showing metrics like:

• Screening coverage (% of enrolled children screened)
• Referral completion rate (% attending first specialist visit)
• Spectacle wear compliance (assessed via school-based spot checks)
• Average time from referral to dispensation (target: ≤14 days)

These dashboards are publicly accessible at https://chakshu.nhp.gov.in/dashboard. Use them to ask informed questions at School Management Committee meetings—and demand accountability when targets are missed. In Kerala’s Alappuzha district, parent-led data audits uncovered a 37-day delay in spectacle delivery; within 4 weeks, the state logistics team reconfigured its courier routing, cutting turnaround to 9.4 days.

Chakshu represents more than policy—it reflects a cultural shift toward proactive, equitable, and evidence-based child health. For parents, it transforms vision care from an occasional expense into a guaranteed right—backed by measurement, transparency, and systems-level support. By understanding its mechanics, leveraging its tools, and holding institutions accountable, families don’t just benefit from Chakshu—they help it evolve, adapt, and save sight—one child, one classroom, one district at a time.