The Refractor Head Manual AA-201 with Arm is a professional ophthalmic refraction instrument designed for accurate subjective assessment of refractive errors, including myopia, hyperopia and astigmatism. Manufactured by Appasamy Associates, the AA-201 combines precision optical lenses, smooth manual adjustment controls and an adjustable mounting arm to provide a practical examination system for optometry clinics, optical shops, eye hospitals and ophthalmology departments.
Also known as the Appasamy AA-201 Manual Phoropter, AA-201 Refractor Head, Manual Refractor with Arm, Optical Clinical Phoropter or Manual Subjective Refraction System, the equipment allows eye care professionals to determine appropriate spectacle lens corrections through controlled lens selection and patient responses.
Subjective refraction is an essential component of professional eye examinations because it helps establish the combination of spherical and cylindrical lenses that provides the patient with suitable visual clarity and comfort.
Unlike an auto refractometer, which estimates refractive error using an automated optical measurement system, the AA-201 Manual Refractor Head allows the practitioner to refine the prescription through direct comparison of different lens powers.
The instrument features rotating spherical and cylindrical lens systems that provide smooth, precise adjustments during examinations.
Its documented spherical measurement range extends from -19.00D to +16.75D, with adjustments in 0.25-diopter increments.
The cylinder system provides measurements from 0 to -6.00D, extending to -8.00D with the appropriate -2.00D auxiliary cylinder lens.
The AA-201 also incorporates a cross-cylinder system, rotating prisms, Maddox rods, polarizing lenses, pinhole apertures and additional auxiliary examination lenses.
These functions make the instrument suitable for routine spectacle prescription refinement and selected binocular vision assessments.
Its adjustable pupillary distance system allows the examiner to align the optical apertures with the patient's eyes.
The AA-201 also features adjustable forehead positioning and a convergence mechanism to support different examination requirements.
Both sides of the optical lenses have anti-reflection coatings, helping maintain clear viewing during refraction.
The included mounting arm allows the refractor head to be positioned in front of the patient and moved aside when not required.
The Refractor Head Manual AA-201 with Arm provides a dependable, mechanically operated refraction solution for healthcare facilities seeking accurate subjective refraction without relying on an automated lens-changing system.
Precision Manual Phoropter: Designed for professional subjective refraction.
Appasamy AA-201 Model: Manufactured for clinical optical examinations.
Spherical Power Range: -19.00D to +16.75D.
Spherical Power Adjustment: 0.25D increments.
Cylinder Power Range: 0 to -6.00D.
Extended Cylinder Measurement: Up to -8.00D with the auxiliary -2.00D cylinder lens.
Cylinder Axis Adjustment: 0° to 180° in 5° increments.
Cross-Cylinder Lens: ±0.25D for cylindrical refinement.
Rotating Prism System: 0–20 prism diopters in 1Δ increments.
Adjustable Pupillary Distance: 50–75 mm.
Auxiliary Lens Dial: Includes several examination lenses and apertures.
Maddox Rods: Supports selected binocular vision and alignment assessments.
Pinhole Aperture: Provides an additional examination option.
Polarizing Lenses: Available for appropriate binocular visual tests.
Anti-Reflection Coated Lenses: Helps maintain clear optical viewing.
Convergence System: Supports suitable near-viewing configurations.
Adjustable Forehead Rest: Helps maintain patient positioning.
Manual Mechanical Operation: Does not require an electronic lens-control system.
Mounting Arm Included: Supports positioning of the refractor head during examinations.
The AA-201 Manual Refractor Head price in Kenya depends on the mounting arm configuration, included accessories, installation requirements, warranty and equipment availability.
Healthcare facilities should request a complete quotation covering the refractor head and its compatible mounting arrangement.
Manufacturer and Model
The AA-201 is manufactured by Appasamy Associates and has a documented range of spherical, cylindrical and auxiliary examination lenses.
Optical Lens System
Lens quality, anti-reflection coatings and mechanical precision contribute to the instrument's performance.
Cylinder and Prism Features
The cross-cylinder system, prism controls and auxiliary lens arrangements provide examination flexibility.
Mounting Arm
The included arm must be compatible with the intended refraction stand, examination table or ophthalmic workstation.
Mechanical Adjustment System
Smooth lens rotation, stable alignment and reliable mechanical controls are important considerations.
Installation Requirements
The mounting arm may require professional assembly and secure attachment to a suitable support.
Additional Accessories
Visual acuity charts, examination chairs, trial frames and other refraction accessories may be purchased separately.
Warranty and Technical Support
Warranty coverage, servicing arrangements and spare-part availability should be confirmed.
Order Online: Maesio Pharmaceuticals Online Shop
The AA-201 Manual Phoropter with Arm is suitable for eye care facilities requiring a dedicated subjective refraction instrument.
Its mechanical lens-changing system and mounting arm provide an organized examination setup for professional optical assessments.
Optical shops.
Optometry clinics.
Eye hospitals.
Ophthalmology departments.
Specialist refraction centres.
Vision care facilities.
Hospital outpatient eye units.
Spectacle prescription centres.
Ophthalmic training institutions.
Optometry teaching facilities.
Private ophthalmology practices.
Specialist optical examination rooms.
Allows the practitioner to select different spherical lens powers while evaluating visual acuity.
This helps refine optical correction for myopia and hyperopia.
Provides cylindrical lens adjustments for the assessment and correction of refractive astigmatism.
The cylinder axis control allows the examiner to adjust the orientation of cylindrical correction.
The cross-cylinder mechanism supports refinement of cylindrical power and axis during subjective refraction.
Prism controls, polarizing lenses and auxiliary components support selected binocular vision examination techniques.
Allows the optical apertures to be aligned with the patient's interpupillary distance.
The convergence mechanism supports appropriate near-refraction arrangements when used with suitable near-vision targets.
Provides a controlled optical system for comparing lens combinations and determining suitable refractive corrections.
The AA-201 contains multiple precision lenses arranged within rotating mechanical assemblies.
The practitioner selects the appropriate spherical and cylindrical lenses using the instrument's adjustment controls.
The selected lenses are positioned in front of the patient's eyes.
The patient views a suitable visual acuity chart and responds to comparisons between different lens settings.
The practitioner uses these responses to refine the spherical power, cylindrical power and astigmatism axis.
Cross-cylinder testing helps compare cylindrical correction options.
The rotating prism system and auxiliary lenses allow additional examination techniques when clinically indicated.
Inspect the refractor head and mounting arm.
Position the instrument securely in front of the patient.
Adjust the forehead rest and pupillary distance.
Confirm the appropriate examination distance.
Select the initial lens powers based on the clinical assessment.
Present a suitable visual acuity target.
Refine spherical power using patient responses.
Assess and refine the cylindrical correction.
Adjust the cylinder axis using appropriate techniques.
Use cross-cylinder testing when indicated.
Perform binocular balancing or additional tests as clinically appropriate.
Evaluate the resulting visual acuity and patient comfort.
Record the final refractive findings.
Move the refractor head aside when the examination is complete.
Subjective refraction should be conducted by appropriately trained eye care professionals.
Supports comprehensive subjective refraction during professional eye consultations.
Allows clinicians to refine lens powers for suitable spectacle correction.
Provides negative spherical lens powers for subjective evaluation of short-sightedness.
Provides positive spherical lens powers for subjective evaluation of long-sightedness.
Supports measurement and refinement of cylindrical correction and axis.
Provides auxiliary optical components for selected binocular vision and ocular alignment examinations.
Supports appropriate near-addition and near-vision assessments when combined with suitable testing materials.
Allows supervised instruction in manual refraction techniques and optical prescription determination.
Both systems support subjective refraction. The choice depends on clinical workflow, examination preferences and required electronic features.
A manual phoropter is suitable for a dedicated examination station, while a trial lens set offers flexibility for different testing environments.
These instruments complement each other in a comprehensive refractive examination.
The manual lens system allows controlled adjustment of spherical and cylindrical corrections.
Cross-cylinder, prism and auxiliary lens functions support a wide range of clinical examination techniques.
Mechanical controls allow the examiner to change lens settings without a computerized operating system.
The mounting arm provides an organized arrangement for positioning the refractor head.
Pupillary distance and forehead rest adjustments help accommodate different patients.
The instrument provides a practical platform for teaching and performing manual subjective refraction.
The AA-201 should be installed using a stable mounting arm compatible with the examination workstation.
Ensure the refractor head is correctly balanced and securely attached.
Position the instrument at a suitable height for patient examination.
Check the mechanical lens controls and pupillary distance adjustments before use.
Keep the optical lenses clean using approved optical cleaning materials.
Avoid excessive force when operating adjustment wheels and rotating lens discs.
Protect the instrument from dust, moisture and mechanical impact.
Clean the forehead contact surface between patients.
Inspect the mounting arm and attachment hardware periodically.
Arrange qualified servicing if lens movement, alignment or mechanical controls become unreliable.
The AA-201 is intended for use by trained eye care professionals.
It supports subjective refraction but does not independently measure the patient's refractive error without examiner input and patient responses.
Accurate results depend on appropriate visual acuity targets, testing distance, optical alignment and examination technique.
Patients with limited communication, poor fixation or difficulty responding may require alternative methods.
The phoropter does not independently assess retinal health, intraocular pressure or corneal curvature.
Final prescriptions should be based on comprehensive professional examination.
The mounting arm must be securely installed and able to support the refractor head safely.
What is the AA-201 Manual Refractor Head?
It is an Appasamy manual phoropter used for subjective measurement and refinement of refractive corrections.
What is the AA-201 Manual Refractor Head price in Kenya?
The price depends on the supplied mounting arm, accessories, installation, warranty and availability.
Where can I buy an AA-201 Phoropter in Nairobi?
You can order or enquire through Maesio Pharmaceuticals Limited.
Who manufactures the AA-201?
The AA-201 is manufactured by Appasamy Associates.
Is the AA-201 a manual or digital phoropter?
It is a manually operated phoropter.
Does the AA-201 come with a mounting arm?
Yes. The Maesio-listed product is specified as an AA-201 with arm.
What is its spherical power range?
The documented spherical power range is -19.00D to +16.75D.
What is its cylinder power range?
It provides 0 to -6.00D, extending to -8.00D with the appropriate auxiliary cylinder lens.
Does it have a cross-cylinder lens?
Yes. A ±0.25D cross cylinder is included in the documented configuration.
Does it support prism testing?
Yes. It includes rotating prisms covering 0–20 prism diopters.
Can it measure astigmatism?
It supports subjective assessment and refinement of astigmatic correction.
Does the AA-201 have adjustable pupillary distance?
Yes. It provides pupillary distance adjustment from 50 to 75 mm.
Does the phoropter require electricity?
The refractor head's manual lens-changing mechanism does not require an electrical operating system.
Can it be used with a digital vision chart?
Yes. It can be used with an appropriately calibrated visual acuity chart.
Can it be used for binocular vision testing?
Yes. The auxiliary lenses and prisms support selected binocular vision examination procedures.
Does it include Maddox rods?
Yes. Horizontal and vertical Maddox rod options are documented.
Is it suitable for optical shops?
Yes. It is suitable for professional optical examination facilities.
Can eye hospitals use the AA-201?
Yes. It is suitable for ophthalmology and optometry departments.
Is the AA-201 suitable for optometry training?
Yes. It supports supervised instruction in manual subjective refraction.
Does it replace an auto refractometer?
No. The AA-201 supports subjective refraction, while an auto refractometer provides objective measurements.
What should I confirm before purchasing?
Confirm the exact model, mounting arm, mechanical condition, complete lens system, installation requirements and warranty.
Does Maesio Pharmaceuticals arrange delivery outside Nairobi?
Yes. Delivery to other locations in Kenya can be discussed according to product availability and order requirements.
Technical Specification Note: The numerical lens ranges, adjustments and physical dimensions correspond to the Appasamy AA-201 manual refractor head. The mounting arm is included in the Maesio-listed product. The arm's exact dimensions, mounting bracket and compatibility with particular refraction units should be confirmed before procurement.
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The Refractor Head Manual AA-201 with Arm is a professional ophthalmic instrument designed for precise subjective refraction and spectacle prescription assessment.
Its comprehensive spherical and cylindrical lens ranges, cross-cylinder system, rotating prisms, auxiliary examination lenses and adjustable mounting arm make it suitable for optometry clinics, optical shops, eye hospitals and ophthalmic training facilities.
The instrument provides controlled manual lens selection and accurate optical adjustments to support professional refractive examinations.
Maesio Pharmaceuticals Limited supplies the Appasamy AA-201 Manual Refractor Head with Arm and other optical refraction equipment for healthcare facilities in Kenya.
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