Prism test, vertical bar

Primary use
Diagnosis / Measurement / Monitoring
Type of medical device or related product
Medical equipment
General vs. specific use (health condition)
Specific
Intended population age
Adolescent (10 to 19 years)
Later adults (over 64 years)
Adults (20 to 64 years)
Intended population sex
All
Level of technical knowledge
Specialized clinical
Capital
Yes
Reusable
Yes
Requirements
None
WHO list of priority medical devices
Eye care (2022)
Service delivery platforms / Healthcare levels
First-level (district) hospital services
Second-level and third-level hospital services and specialized outpatient services
Healthcare unit
Inpatient care
Outpatient care
Specialized diagnostics
EMDN related code(s)
Z1212012001
VISUAL FUNCTIONAL ASSESSMENT EQUIPMENT
The code(s) and term(s) in this section were observed and retrieved from public databases and have not been validated by health regulatory authorities. Please consult your regulatory agency and EMDN site: https://webgate.ec.europa.eu/dyna2/emdn
GMDN related code(s)
32716
Maddox wing (A hand-held, non-powered ophthalmic device intended to evaluate heterophoria/heterotropia, also known as strabismus or squint [i.e., a condition in which the eyes are pointing in slightly different directions (e.g., esophoria, exophoria, hyperphoria and/or cyclophoria)]. It is typically held by the patient, and consists of an eyepiece oriented towards a small board with a scale(s) [e.g., horizontal, vertical] and pointer(s), and a thin sheet (septum) which separates the board into two parts to create a different field of view for each eye (eye dissociation).)
The medical device term(s), code(s) and definition(s) in this section were retrieved from databases external to WHO. As there might be more than one name, definition and “Nomenclature Code” related to the specific medical device, please consult https://gmdnagency.org GMDN ®. © GMDN Agency 2005-2024 
Decommissioning
WHO resources on medical devices