Netra Autorefractor

Refraction Mobilized

Using a series of simple game-like interactions in a Virtual Reality headset, NETRA enables anyone anywhere to collect refractive measurements in terms of sphere, cylinder, axis of astigmatism and pupillary distance.

For mobile eye diagnostics or vision screenings, the handheld NETRA auto-refractor measures sphere, cylinder, axis and pupillary distance through a series of game-like interactions in a virtual-reality environment.

NETRA's interactive nature puts control back in the hands of the patient. A provider using EyeNetra mobile tools empowers his or her patients to take a more active role in their eye care; fostering trust in the patient-provider relationship and vastly improving the customer experience.

Downloads and References

Brochure
User Manual
Product Catalog
Warranty (1 year)
Refund policy (10-day trial)
Clinical Studies, Optical Studies, PhD Thesis

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Featured Benefits

Accuracy of 0.35D

NETRA is as accurate as top-tier auto refractors that can cost $45,000. It took 340 product iterations and 35,000 product tests to ensure this level of precision and control accommodation.

Ultra-portable

NETRA lets you take the reins no matter where you are, from a hospital in the urban jungle to a tent in the Amazon. It comes with an extended battery for 2 days of tests without charging.

Connected

The smartphone becomes a gateway for information between eye care providers and customers. On the Insight portal, patients and eye care providers navigate health information and converge to the best prescription.

Zero maintenance

Netra can drop from a maximum height of 1 meter without breaking or losing accuracy. Calibration happens automatically at every measurement. After two years selling the product, we have yet to see a broken NETRA.

Technical Specifications

Technology	NETRA Refraction ^{(Pat. Issued)}
Accommodation Control	Fogging ^{(Pat. Issued)}
Light Source	Smartphone Display ^{(No Lasers)}
Measuring Wavelengths	~550nm and ~650nm Simultaneously
Sphere Range	-12 to +5.5D, 0.25D increment
Cylindrical Range	0 to -7D, 0.25D increment
Axial Range	0 to 180, 1 degree increment
Interpupillary Distance Range	52 to 72mm, 0.5mm increment
Device Dimensions	8.5cm x 20cm x 20cm (436g)
Intended Patient Population	13 to 65 years old
External Processing Unit	Samsung S4
Dilation Required	No
Cycloplegic Requirements	None
Calibration Requirements	None
Office Illumination Requirements	None (Optically Sealed)
Specialized Furniture Requirements	None (Handheld)
FDA Status	NETRA (v1.01) is a Class 1 device exempt from premarket notification (510(k)
operation	15°C to 40°C, in rel. humidity of 95% non-condensing
storage/transport	-20°C to 90°C, in rel. humidity of 95% non-condensing

Code your own integration

Example: Downloading all measurements with Python.

Full code here

See the complete documentation here.

Python Script to Download all measurements

import json
import requests

# api-endpoint 
URL = "https://insight-api.eyenetra.com/api/v1/"
URL_LOGIN = URL + "login"
  
# login parameters 
data = {'email':"you", 'password': "your password"} 
  
# authenticate 
r = requests.post(url = URL_LOGIN, data = data) 

# storing session token
token = json.loads(r.text)['token']

# last NETRA measurements since Jan 1, 2020
URL_MEASUREMENTS = URL + "test_results"
headers = {'Content-Type': 'application/json',
           'Authorization': 'Token token="{0}"'.format(token)}
params = {'test_method':'Netra', 
          'updated_since':"01-01-2020"}

# calling the api
r = requests.get(url = URL_MEASUREMENTS, 
                 headers = headers, 
                 params = params)            

measurements = json.loads(r.text)

print("Results: " + r.text);

Self-test refraction tool powered by a smartphone.

Netra Autorefractor

Downloads and References

How to use it

Frequently Asked Questions

Featured Benefits

Accuracy of 0.35D

Ultra-portable

Connected

Zero maintenance

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Technical Specifications

Meet our Powerful Result Screen

Code your own integration

Python Script to Download all measurements

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EyeNetra, Inc.