The Trial Set Box Medium (158 Pcs) is a professional ophthalmic refraction kit designed for subjective vision testing, prescription assessment and routine eye examinations. The set contains 158 optical trial lenses and accessories arranged in a portable storage case, providing eye care professionals with essential instruments for manual refraction procedures.
Also known as a 158-Piece Trial Lens Set, Optical Trial Lens Box, Medium Refraction Trial Case, Optometry Trial Set or Ophthalmic Trial Lens Kit, this equipment is suitable for optometry clinics, ophthalmology departments, optical centres, eye hospitals and vision testing facilities.
The trial lens set includes spherical lenses, cylindrical lenses and auxiliary examination lenses used to evaluate different refractive conditions. These lenses are inserted into a compatible trial frame, allowing practitioners to assess visual clarity and determine appropriate corrective lens powers.
Spherical lenses are used to assess myopia and hyperopia, while cylindrical lenses help determine the power and axis required to correct astigmatism.
Auxiliary lenses support additional examination techniques, including pinhole testing, binocular vision assessment and selected ocular alignment procedures.
The medium-sized case provides an organized arrangement of lenses, allowing practitioners to identify and retrieve the required optical powers during examinations.
Each lens is marked with its optical power or identifying information to simplify selection and help reduce errors during testing.
The rigid storage box helps protect the lenses from accidental damage, dust and unnecessary handling.
Unlike a digital phoropter, the trial lens set does not require electricity, computerized controls or an automated lens-changing mechanism.
Its manual operation makes it particularly useful for routine clinical examinations, mobile eye care services, teaching environments and facilities requiring a practical refraction kit.
The Trial Set Box Medium (158 Pcs) offers a compact and versatile solution for healthcare professionals seeking a reliable optical trial lens set for subjective refraction and spectacle prescription assessment.
Complete 158-Piece Set: Contains a selection of optical trial lenses and examination accessories.
Spherical Lenses: Includes positive and negative lenses for assessing hyperopia and myopia.
Cylindrical Lenses: Supports astigmatism examination and prescription refinement.
Auxiliary Examination Lenses: Provides additional optical elements for selected vision testing procedures.
Clearly Marked Lens Powers: Enables easy identification of lenses during refraction.
Organized Storage Case: Keeps lenses arranged for convenient access and storage.
Portable Design: Suitable for clinical use, outreach programmes and teaching.
Manual Refraction System: Operates without electricity or computerized controls.
Trial Frame Compatibility: Designed for use with a suitable ophthalmic trial frame.
Professional Optical Application: Suitable for optometrists, ophthalmologists and trained vision care personnel.
Protective Lens Rims: Helps minimize unnecessary handling of optical surfaces.
Clinical Training Support: Useful for demonstrating subjective refraction techniques.
The 158-piece trial lens set price in Kenya depends on the manufacturer, optical lens material, lens accuracy, rim construction, included accessories and storage case design.
Different configurations may include varying lens power ranges, optical materials and trial frame accessories.
Manufacturer and Model
Different manufacturers offer varying lens configurations, optical tolerances and storage case designs.
Lens Material
Trial lenses may be manufactured using optical glass or suitable optical polymers, depending on the supplied model.
Lens Power Range
The available spherical and cylindrical power ranges affect the examination capabilities of the set.
Lens Rim Construction
Metal and high-strength plastic rims provide different handling and durability characteristics.
Auxiliary Accessories
The inclusion of prism lenses, cross-cylinder lenses, pinhole lenses and filters influences the package.
Storage Case
A protective case with organized compartments helps safeguard lenses during storage and transportation.
Trial Frame Inclusion
Some packages include a compatible trial frame, while others require it to be purchased separately.
Warranty and Support
Product warranty, replacement lens availability and after-sales assistance should be confirmed before purchasing.
Product Detail
Description
Product Name
Trial Set Box Medium (158 Pcs)
Equipment Category
Optical Diagnostic Equipment
Equipment Type
Manual Trial Lens Set
Total Pieces
158
Spherical Lenses
Included
Cylindrical Lenses
Auxiliary Lenses
Prism Lenses
Configuration-Dependent
Optical Glass or Acrylic
Lens Rims
Metal or High-Strength Plastic
Lens Markings
Clearly Identified Powers
Storage
Rigid Trial Lens Case
Trial Frame
Confirm Inclusion
Primary Application
Subjective Refraction
Intended Users
Optometrists and Eye Care Professionals
Supplier
Maesio Pharmaceuticals Limited
Availability
Subject to Confirmation
Order Online: Maesio Pharmaceuticals Online Shop
The Trial Set Box Medium (158 Pcs) is suitable for healthcare facilities requiring manual refraction equipment for routine vision assessment and spectacle prescription verification.
Eye care professionals can enquire through Maesio Pharmaceuticals Limited for product availability and purchasing information.
Optometry clinics.
Ophthalmology departments.
Optical shops with examination services.
Eye hospitals.
Vision screening centres.
Community eye care facilities.
Hospital outpatient eye clinics.
Optical training institutions.
Mobile eye examination programmes.
Private eye care practices.
Convex spherical lenses are used during subjective examination of hyperopia and selected near vision requirements.
Concave spherical lenses support the examination and refinement of myopic refractive corrections.
Positive cylindrical lenses allow practitioners to assess astigmatic correction using a plus-cylinder refraction approach.
Negative cylindrical lenses support astigmatism assessment using a minus-cylinder refraction approach.
A Jackson cross-cylinder lens assists with refinement of cylinder power and axis during subjective refraction.
Prism lenses can support selected binocular vision and ocular alignment examinations when included.
The pinhole lens helps clinicians assess whether reduced visual acuity may improve when optical blur is reduced.
An occluder is used to cover one eye during monocular vision testing.
These filters can support selected binocular vision and dissociation procedures.
A stenopaic slit may assist selected refractive examinations, particularly when evaluating astigmatic orientation.
The exact assortment should be confirmed for the supplied product. A commonly available 158-piece configuration contains the following components.
Lens Category
Typical Quantity
Positive Spherical Lenses
50
Negative Spherical Lenses
Positive Cylindrical Lenses
24
Negative Cylindrical Lenses
4
6
Total
Typical spherical lens ranges extend from ±0.25 D to ±12.00 D, while cylindrical lens ranges commonly extend from ±0.25 D to ±4.00 D.
These ranges describe a common 158-piece arrangement and must be verified against the supplied set.
The trial lens set works by placing selected lenses into a compatible trial frame positioned in front of the patient's eyes.
The practitioner uses a visual acuity chart to assess how different lens powers affect the patient's vision.
Spherical lenses are introduced to determine the approximate refractive correction required.
When astigmatism is present, cylindrical lenses are added and their axes adjusted to refine visual clarity.
The examiner changes lens combinations according to the patient's responses until an appropriate correction is established.
Additional lenses and filters may be used for selected examination procedures.
Position the patient at the recommended examination distance.
Select and adjust a compatible trial frame.
Align the trial frame with the patient's eyes.
Measure and set the appropriate pupillary distance.
Establish the starting refractive correction.
Insert the appropriate spherical trial lenses.
Present suitable visual acuity targets.
Adjust the spherical lens power according to patient responses.
Introduce cylindrical lenses when astigmatism assessment is required.
Refine cylinder axis and power using appropriate examination techniques.
Perform binocular balancing or near vision testing when indicated.
Record the final subjective refraction findings.
Return all lenses to their designated storage positions.
The examination should be performed by trained eye care personnel using established subjective refraction procedures.
Myopia Assessment
Supports manual subjective assessment and refinement of negative spherical lens corrections.
Hyperopia Assessment
Allows examination of positive spherical lens corrections.
Astigmatism Examination
Supports determination and refinement of cylindrical lens power and axis.
Presbyopia Assessment
Allows practitioners to assess near vision requirements using appropriate plus lenses.
Spectacle Prescription Verification
Supports comparison of different corrective lens combinations during prescription assessment.
Binocular Vision Testing
Selected auxiliary and prism lenses assist with binocular examination procedures.
Vision Screening
Useful for subjective refraction during clinical and community eye care services.
Clinical Training
Provides practical equipment for teaching lens selection, refraction methods and optical principles.
Feature
158-Piece Set
266-Piece Set
Lens Collection
158 Pieces
Approximately 266 Pieces
Prism Selection
More Limited
Generally More Extensive
Medium
Larger
Portability
Convenient
Less Compact
Clinical Use
Routine Refraction
Broader Refraction Requirements
Training Application
Suitable
Main Difference
Compact Lens Selection
Expanded Lens Selection
A 158-piece set is a practical option for routine subjective refraction and clinical training. A larger trial set may offer additional optical powers and examination accessories.
158-Piece Trial Lens Set
Digital Phoropter
Lens Changes
Manual
Motorized
Electrical Power
Not Required
Required
Lens Selection
Individual Trial Lenses
Electronic Controls
Generally Portable
Workstation-Based
Spherical Refraction
Yes
Cylinder Refraction
Digital Integration
No
Model-Dependent
Clinical Application
Manual Subjective Refraction
Computerized Subjective Refraction
Both instruments support subjective refraction. The trial lens set provides a manual solution, while a digital phoropter offers electronically controlled lens changes.
Portable Examination Equipment
The medium-sized storage case allows the lenses to be transported between examination locations.
Organized Lens Selection
Clearly identified lens positions support convenient retrieval and replacement.
Versatile Refraction Functions
The selection of spherical, cylindrical and auxiliary lenses supports different vision examination procedures.
No Electricity Required
The set can be used without an electrical power connection.
Useful for Clinical Training
Individual lenses help students understand refractive powers and subjective examination techniques.
Suitable for Routine Practice
The equipment supports regular optometry and ophthalmology refraction services.
Selection Factor
What to Confirm
Manufacturer
Brand and Model
Spherical Power Range
Available Powers
Cylinder Power Range
Lens Rim
Metal or Plastic
Optical Accuracy
Manufacturer's Tolerances
Clear and Legible
Included Quantities and Powers
Included Types
Included or Separate
Material and Construction
Replacement Lenses
Warranty
Coverage
Quotation Requirement
Details
Product
Trial Set Box Medium
Quantity
Required Sets
Confirm
Specify if Required
Delivery
Nairobi or Another Kenyan Location
Store all trial lenses in their designated compartments after use.
Avoid touching optical surfaces directly with fingers, as oils and dirt can affect lens clarity.
Use suitable optical cleaning materials and follow the manufacturer's recommended cleaning procedures.
Inspect lenses regularly for scratches, cracks, loose rims and faded power markings.
Keep the trial case closed when the equipment is not in use.
Protect the lens collection from excessive heat, moisture, dust and accidental impacts.
Disinfect applicable examination accessories according to approved infection prevention procedures.
Replace damaged or incorrectly marked lenses to maintain examination accuracy.
The trial lens set should be used by appropriately trained eye care professionals.
Subjective refraction requires patient cooperation and professional interpretation.
A trial lens set does not independently measure refractive error or automatically generate spectacle prescriptions.
The equipment does not replace an auto refractometer, retinoscope or comprehensive ophthalmic examination.
Accurate results depend on suitable lens selection, trial frame positioning, examination techniques and reliable patient responses.
The optical accuracy and completeness of the supplied lenses should be checked before clinical use.
What is a Trial Set Box Medium (158 Pcs)?
It is a collection of 158 optical trial lenses and accessories used during manual subjective refraction and vision examinations.
What is the trial lens set 158 pcs price in Kenya?
The price depends on the manufacturer, lens material, optical accuracy, accessories, storage case and warranty.
Where can I buy a 158-piece trial lens set in Nairobi?
You can enquire through Maesio Pharmaceuticals Limited or visit the online shop for product information.
What is the trial lens set used for?
It is used for subjective refraction, spectacle prescription assessment and selected binocular vision examinations.
Does the trial set contain spherical lenses?
Yes. The set includes positive and negative spherical lenses.
Does it include cylindrical lenses?
Yes. Cylindrical lenses are included for astigmatism examination.
Are prism lenses included?
Prism lenses are commonly included in 158-piece configurations. Confirm the exact contents of the supplied set.
Does the trial set include a trial frame?
Trial frame inclusion depends on the product package and should be confirmed before purchasing.
Can the set be used for myopia examination?
Yes. Negative spherical lenses support subjective myopia correction assessment.
Can it be used for hyperopia examination?
Yes. Positive spherical lenses support hyperopia assessment.
Is the trial lens set suitable for astigmatism testing?
Yes. Cylindrical lenses and a suitable cross-cylinder accessory support astigmatism refinement.
Can it be used for presbyopia assessment?
Yes. The set can support near vision correction assessment using appropriate trial lenses.
Does the trial set require electricity?
No. It is a manual optical examination system.
Is the 158-piece trial lens set portable?
Yes. The medium-sized storage case makes it convenient to transport when necessary.
Can optical clinics use the equipment?
Yes. It is suitable for optical centres offering professional vision examination services.
Is the trial lens set suitable for optometry students?
Yes. It supports practical training in subjective refraction and optical lens selection.
What is the difference between a 158-piece and 266-piece trial set?
A 266-piece trial set generally provides a wider selection of lenses and accessories, while the 158-piece set offers a more compact collection.
Does the trial lens set automatically determine spectacle prescriptions?
No. A qualified eye care professional must perform the examination and interpret the results.
What should I check before purchasing?
Confirm the lens count, available powers, lens material, included accessories, case quality and trial frame compatibility.
Does Maesio Pharmaceuticals arrange delivery outside Nairobi?
Yes. Delivery to other locations in Kenya can be discussed according to product availability and order requirements.
Specification
Optical Trial Lens Set
Category
Ophthalmic Diagnostic Equipment
Positive and Negative
Typical Spherical Range
±0.25 D to ±12.00 D
Typical Cylinder Range
±0.25 D to ±4.00 D
Cross-Cylinder
Rim Material
Lens Power Markings
Rigid Protective Box
Power Supply
Main Application
Technical specification note: The stated lens power ranges represent a common 158-piece trial lens configuration. Exact powers, prism values, lens materials and accessory quantities should be confirmed for the supplied product.
Trial Lens Set Box Large (266 Pcs)
Adjustable Trial Frame
Streak Retinoscope
Digital Refractor with Arm (PDR-7000)
The Trial Set Box Medium (158 Pcs) is a professional optical examination kit designed for manual subjective refraction, vision assessment and spectacle prescription refinement.
Its organized collection of spherical, cylindrical and auxiliary lenses makes it suitable for optometry clinics, optical centres, ophthalmology departments and clinical training facilities.
The portable storage case and manual operating method offer a practical solution for healthcare professionals requiring reliable refraction equipment.
Maesio Pharmaceuticals Limited supplies trial lens sets and other ophthalmic examination instruments for professional eye care facilities.
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