Comprehensive ophthalmic trial lens set with spherical, cylindrical and prism lenses for subjective refraction, assessment of refractive error and determination of appropriate optical correction.
The IndoSurgicals Trial Lens Set is a comprehensive collection of ophthalmic lenses designed for use during subjective refraction and vision testing. It provides ophthalmologists, optometrists and other trained eye-care professionals with a wide selection of spherical, cylindrical and prism lenses for systematic assessment of refractive correction.
Trial lenses are placed in a suitable trial frame and changed progressively according to the patient's visual response. This allows the examiner to evaluate and refine optical correction for common refractive errors including myopia, hyperopia, astigmatism and presbyopia.
The lenses are organised in a protective hard-plastic case, providing convenient identification, storage and access during routine clinical examinations.
Includes convex and concave spherical lenses for assessment and correction of spherical refractive errors.
Convex and concave cylindrical lenses support assessment and refinement of astigmatic correction.
Includes a range of prism powers for appropriate binocular vision and ocular alignment assessments.
Lens powers are provided in fine gradations within commonly used refractive ranges for systematic subjective refraction.
Supplied in a sturdy refined hard-plastic case designed to organise and protect the individual trial lenses.
Suitable for ophthalmology clinics, optometry practices, eye hospitals and training institutions.
The set provides an extensive selection of positive and negative spherical and cylindrical powers together with prism lenses, allowing a wide range of refractive and binocular vision examinations to be performed.
Positive and negative spherical lenses are used during refraction to assess spherical refractive error, particularly hyperopia and myopia.
Positive and negative cylindrical lenses enable the examiner to assess and refine cylindrical power during evaluation of astigmatism.
Prism lenses provide controlled optical displacement and can be used as part of appropriate binocular vision, ocular alignment and prism assessment procedures.
Fine power intervals allow the examiner to progressively modify the optical correction and evaluate the patient's subjective visual response.
| Lens Power Range | 0.25 D to 4.00 D |
|---|---|
| Power Interval | 0.25 D steps within the stated range |
| Additional Range | 4.50 D to 6.00 D |
| Additional Interval | 0.50 D steps within the stated range |
| Higher Powers | 16.00 D to 20.00 D in 2.00 D steps |
The Trial Lens Set includes ten prism powers for use during appropriate binocular vision and ocular alignment examinations. Prism power is expressed in prism dioptres (Δ).
Trial lenses are normally used together with an adjustable trial frame during subjective refraction.
A suitable trial frame is adjusted according to the patient's pupillary distance and facial dimensions.
Appropriate spherical or cylindrical trial lenses are selected on the basis of preliminary refraction findings and inserted into the frame.
The patient views an appropriate visual acuity chart or test target while the examiner evaluates their response to the selected correction.
Lens powers are progressively changed or combined until the examiner determines the most appropriate subjective refractive correction.
Spherical trial lenses allow positive and negative spherical powers to be evaluated during subjective refraction, helping quantify spherical refractive error.
Cylindrical trial lenses allow cylindrical power to be introduced and refined during assessment of astigmatic refractive error.
Positive trial lenses can be used as part of near refraction to assess the additional optical power required for comfortable near vision.
Prism lenses can be introduced during appropriate binocular vision examinations where controlled optical displacement is required.
A comprehensive trial lens set contains a large number of individual optical lenses. Proper organisation is therefore important both for protecting the lenses and for allowing the examiner to quickly locate the required power during an examination.
The IndoSurgicals Trial Lens Set is supplied in a sturdy case manufactured from refined hard plastic. The case helps protect the trial lenses from accidental impact and provides organised storage for efficient routine use.
| Product Name | Trial Lens Set |
|---|---|
| Brand | IS IndoSurgicals® |
| Category | Diagnostic Equipment - Ophthalmology Instruments |
| Spherical Lenses | Published source references 32 spherical-lens pairs; confirm the current plus/minus distribution before procurement |
| Cylindrical Lenses | Published source references 20 cylindrical-lens pairs; confirm the current plus/minus distribution before procurement |
| Prism Lenses | 0.5Δ, 1Δ, 2Δ, 3Δ, 4Δ, 5Δ, 6Δ, 8Δ, 10Δ and 12Δ |
| Storage | Protective refined hard-plastic case |
| Primary Application | Subjective refraction and vision testing |
| Suitable For | Ophthalmologists, optometrists, eye hospitals, clinics, vision centres, medical colleges, optometry institutions and training centres |
A Trial Lens Set provides the optical lenses required for subjective refraction, but the final refractive prescription depends on professional examination, patient response and appropriate clinical interpretation.
IndoSurgicals Private Limited manufactures, supplies and exports ophthalmology and diagnostic instruments for hospitals, eye-care professionals, medical institutions, dealers and distributors.
The IndoSurgicals Trial Lens Set provides an extensive selection of spherical, cylindrical and prism lenses in an organised protective case for professional subjective refraction and vision assessment.
Contact IndoSurgicals for Trial Lens Set product information, hospital procurement, institutional requirements, dealer and distributor enquiries, bulk quantities or international export requirements.
Contact IndoSurgicalsProduct images and specifications are provided for general reference. Product design, colour, packaging and specifications may be updated without prior notice. Please confirm current specifications, certification scope and regulatory applicability before ordering.
