Refraction test is an eye examination that measures a person prescription for eye glasses and contact lenses.
What is it done for?
–It is done as a part of routine eye examination to determine if a person has normal vision or is having refractive error (hypermetropia,myopia and astigmatism).
How is it done?
It is done in two ways
1- Manual Refraction that is with retinoscope
2- Automated Refraction that is with automated refractometer.
It is done in two forms.
a- Dry refraction that is without drops.
b- Wet refraction that is with pupil dilator drops.
What are the benefits?
When a person complains of blurred vision this test helps to determine the extent of poor vision. It can also be done in monitoring a person who is being treated for a particular eye disease. It is used to measure the degree of hypermetropia, myopia and astigmatism.
What are the limitations?
Blurred vision, eye redness, irritation and watering and fluctuations in blood sugar levels.
How much time is taken?
For dry refraction 20 minutes are required. For wet refraction 1 hrs is required.
When is to be repeated?
Normally 6 months to 1 year is advised for routine eye examination provided patient is not suffering from any eye disease which requires early eye examination.
What are other alternative tests?
Eye test and vision screening test.
How much does it cost?
The cost may vary from one hospital to the other.
Dhawan, New Delhi, India.
Updated on 13 May 2011
Dr. Sanjay Dhawan, MBBS, MS (Gold
Medalist), DO - Additional Director & Head of Department - Ophthalmology. Phone: +91-9810009144 Appointment by phone: +91-9540009144/+91-9910009144OR call Helpline (+91) 9910009144 for
any assistance. Appointment by E-mail: email@example.com
Available at: Fortis Healthcare Limited
Sector 44 (Opposite HUDA City Centre Metro Station)
Gurgaon, Haryana - 122002, India
S-341, Panchsheel Park, New Delhi 110 017