Refraction / Vision Test
About the procedure
Refraction is the measurement of refractive errors, including myopia, hyperopia, and astigmatism, to determine the appropriate corrective lenses. The assessment combines objective techniques like autorefractor or retinoscopy with subjective refinement using a phoropter. Visual acuity charts are used to evaluate clarity of vision. Refraction is essential for prescribing glasses or contact lenses, monitoring changes in vision, and maintaining routine eye care. The procedure is non-invasive, quick, and forms the foundation for comprehensive ophthalmic evaluations. No recovery is required; patients leave with prescriptions and guidance for corrective options.
Care before the procedure
- Remove contact lenses prior to the eye examination appointment.
- Avoid eye makeup that may interfere with measurement accuracy.
- Bring any existing spectacle or contact lens prescriptions for reference.
- Inform the examiner about recent vision changes or eye problems.
Care during the procedure
- Sit steadily and focus on the visual acuity charts as instructed.
- Follow the examiner’s instructions during phoropter or retinoscopy testing.
- Blink normally and avoid squinting during measurements.
- Report any visual discomfort or difficulty clearly to the examiner.
Care after the procedure
- No special precautions are needed following the refraction test.
- Use the provided prescription to obtain glasses or contact lenses.
- Follow guidance on lens type, power, and usage schedule.
- Schedule follow-up if vision changes or discomfort persists.
Eligibility
- Individuals experiencing blurry vision, difficulty focusing, or eye strain requiring corrective lenses.
- Patients undergoing routine eye examinations to monitor refractive changes over time.
- Children and adults needing updated prescriptions for glasses or contact lenses.
- Individuals with systemic or ocular conditions affecting vision requiring regular monitoring and correction.
Relevant Diseases & Conditions
Abdominal Pain
Abdominal pain refers to discomfort originating anywhere in the abdominal cavity. It can be acute or chronic, ranging from mild discomfort to severe, potentially life-threatening pain. Causes include gastrointestinal infections, constipation, biliary or urinary diseases, recent surgery, trauma, systemic illness, and medications.
Relevant Specialties

Anesthesiology
Our Department of Anesthesiology and Perioperative Medicine provides comprehensive anesthetic care across surgical and interventional procedures, supporting more than 1 lakh patients every year. With a multidisciplinary team of pediatric anesthesiologists, we deliver local, regional, sedation and general anesthesia tailored to individual needs. Advanced expertise includes cardiac, transplant, neuro, bariatric, & oncology, alongside ultrasound-guided regional techniques and complex airway management. In addition, our services also include interventional support, critical care, and acute and chronic pain management.






