NeurOptics | RAPiDo
rapido - relative afferent pupillary defect pupillometer
ophthalmic, ophthalmic surgery, ophthalmologist, ophthalmology, optometry, ophthalmology examination
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RAPD (Relative Afferent Pupillary Defect) Pupillometer

The new RAPiDo is a portable, all-in-one device which detects and quantifies:

Relative Afferent Pupillary Defects (RAPD)

Pupil diameter under different light conditions

Efferent Pupillary Defects


The days of using the subjective and difficult to perform “swinging flashlight test” are over! Screen and assess retina or optic nerve disorders with ease!

Simple to use and operate

Reproducible measurement results in less than a minute by a technician

Stimulates each eye with light

Records both the right and left pupil responses simultaneously to calculate the magnitude of the relative afferent pupillary defect in light log units

Pupil Diameter for Refractive Surgery

Provides very accurate measurement of pupil diameter for refractive surgery screening and planning (LASIK and IOLs) under: scotopic, low mesopic, and high mesopic conditions.

Efferent Pupillary Defects

Detects efferent pupillary defects including: parasympathetic nerve deficits (e.g., oculomotor nerve, brainstem, Adie’s pupil).

Sympathetic nerve defects (e.g., Horner’s syndrome) and pharmacological causes of unequal pupils.


Portable, battery operated binocular pupillometer

No external computer required

Touchscreen, user-friendly, LCD display

Automatic pupil detection and tracking

Automatic blink detection

Patient data may be uploaded via USB

Can be used as a hand-held device (for supine patients) or mounted onto a stand

RAPD graphically displayed immediately after the measurement

Normative range provided

Internal memory for storing more than 1,000 records

Records can be browsed using the touchscreen graphical interface