Online Chat

With us

X

Looking for e-Bike…?

JVVF312 Vergence Facility Prism Flipper 12D and 3D
JVVF312 Vergence Facility Prism Flipper 12D and 3D - Image 2
JVVF312 Vergence Facility Prism Flipper 12D and 3D - Image 3
JVVF312 Vergence Facility Prism Flipper 12D and 3D - Image 4

JVVF312 Vergence Facility Prism Flipper 12D and 3D

Vergence Facility Prism Flipper 12D BO / 3D BI | 6PD & 1.5PD Prism Power | Vision Therapy Tool for Optometrists & Eye Exercises | White Plastic Body | Base In Base Out Training Tool

₹500.00

next day delivery

check availability

pick localy

check availability

You may also like …

  • JVCTF Universal Clinical Frame
  • JVTFTP Pediatric Titanium Trial Frame 48-60 mm
  • 257000 Lea Symbols 15 Line Pediatric Eye Chart
SKU: JVBS510-1-1-1-1-1-3-1-1-1-1-1-1-1-1-1-1

Description

Plastic

Beads

Nylon

String

Beads

wood

Therapeutic

heavier cords

Product description

  • Dual Prism Powers for Vision Training: This prism flipper features a combination of 6PD and 1.5PD prisms, providing the flexibility needed for vergence facility testing and binocular vision exercises. It’s designed to assess how quickly and accurately the eyes can converge and diverge, helping improve eye coordination and reduce visual fatigue in patients with convergence insufficiency or similar conditions
  • 12D Base Out & 3D Base In Configuration: Engineered for professional vision therapy use, the flipper includes a 12 diopter base out (BO) and 3 diopter base in (BI) range. This configuration is ideal for challenging the eyes during convergence and divergence training. It allows optometrists and therapists to evaluate and improve the efficiency of eye movements during near work and visual stress tasks

TopicDiscription
PurposeThe device is used to evaluate and train vergence facility — i.e., the ability of the eyes to rapidly alternate between convergence (base-out prism) and divergence (base-in prism) while maintaining clear, single vision.
It is also used as a screening tool for binocular vision anomalies (e.g., convergence insufficiency, divergence weakness, fusional vergence dysfunction).
Often used in vision-therapy or orthoptic settings to measure how many cycles (switches) per minute a patient can perform through the prism flipper. A “normal” benchmark is around 15 cycles per minute for the 12/3D combination at near (40 cm) in many sources.
Target usersPatients with binocular vision problems: e.g., children or adults who complain of eye strain, difficulty with near work, reading fatigue, diplopia or intermittent blur during convergence/divergence tasks.
Clinic/orthoptic practitioners using it as part of vision assessment or therapy.
Possibly used in vision screening or therapy monitoring: the device is relatively simple and quick to use.
It is less suited for purely acuity testing; rather it is for binocular function.
Optotypes / SymbolsThe prism flipper does not itself include optotypes or symbols (letters, numbers etc). It is used in conjunction with a visual target (chart, letters or symbols) that the patient views while the prism is alternated. This target is usually sized for near vision.
So you will need a suitable target (chart or column of letters) fixed at the correct distance for the test.
Scaling / SpacingThe spacing and size of the optotypes (symbols) is determined by the target chart, not by the flipper itself. The flipper simply imposes prism demand.
Therefore you should ensure the target you use has proper spacing between lines and letters consistent with standard near visual acuity (e.g., ~20/30) when viewed at the test distance.
The flipper’s prism plates themselves are specified to be 1.5″ high (≈38 mm) in this model. That gives an idea of the physical height of the prism.
Range of Acuity / Line SizesThe flipper specification does not define the full range of acuity or specific line sizes beyond the suggestion of using a 20/30 near target. For example: “…use with a 20/30 near point line.”
jutronvision.com
The key requirement is that the patient’s visual acuity (corrected) be good enough to resolve the target, so that the limiting factor in the test is vergence facility rather than blur from wrong chart size.
Some clinical literature suggests that for 3Δ BI / 12Δ BO prism flippers, normative values at near (~40 cm) are ~10 cycles per minute or more in asymptomatic adults.
PubMed
But the flipper itself isn’t rated for an acuity range; acuity depends on the target used and patient correction.
Testing DistanceThe device is specified for use at ≈ 16 inches (40 cm) in many of the product-specs.
So your setup should position the target at 40 cm from the patient, with proper near correction (if used) and the flipper in the patient’s line of sight.
You may also encounter distance versions of vergence facility, but the standard for this 12/3D combination is near.
Physical Size & DimensionsThe prism plates for this model are specified as 1.5″ high (~38 mm) for each prism unit.
The holder or flipper mechanism size is not fully published in some sources, but typical handheld prism flippers are small enough to fit in clinic pocket.
Thus you should check for handle length, ease of flipping, weight, and that the prism plates align well in front of one eye when used.
MountingThe device comes in different variants
Mounted to a stainless-steel stick/holder.
Unmounted loose (i.e., just the prism plates) so you can hold them manually.
Magnetic version which allows prism to be either mounted or loose.
Display FeaturesThere is no display on the device itself; monitoring is via the patient’s vision of the target and counting cycles (flips) per minute.
The prism plates typically are base-out and base-in marked; you must ensure the plate orientation is correct (base direction) for the facility test.
AccessoriesThe standard product listings do not promise many accessories. For example: “These vergence prisms quickly screen … Use at 16″ … Prisms are 12D BO and 3D BI and 1.5″ high.”
If you buy from an equipment supplier, you might receive: the prism flipper device, a protective case or pouch, instructions for use.
Additional extras might include the magnetic mounting option or spare/prism plates (if a modular model).
Check whether replacement plates are available for future maintenance.
Durability / Material QualitiesGood quality models use optical-grade materials (prism glass or acrylic) that are precisely manufactured to required prism diopter values without significant distortion.
The specification: “1.5″ high (38 mm)” prism plates suggest compact robust size.
Important material qualities: prism surfaces scratch-resistant, base direction clearly marked, mount stable, no wobble during flip, minimal optical aberration.
A marker of quality: brand reputation (e.g., Good-Lite), specification clarity (12D BO / 3D BI), availability of versions (mounted/unmounted/magnetic).
Also look for lifetime support / spare parts, cleaning instructions, and case to protect optics.
UsabilityClear markings, smooth flipping, brand reputation, clinical validation

Reviews

There are no reviews yet.

Be the first to review “JVVF312 Vergence Facility Prism Flipper 12D and 3D”

Your email address will not be published. Required fields are marked *

Related products

view all products
  • JVTFTA Adult Titanium Trial Frame 54-70 mm

    JVTFTA Adult Titanium Trial Frame 54-70 mm

    Alloy Optometry Frame, Optical Trial Lens Frame for Eye Optometry…

    ₹500.00
  • JVBEP Black Eye Patches

    JVBEP Black Eye Patches

    Monocular Black Eye Patch, Washable, Adjustable Amblyopia, Medical Eye Patch,…

    ₹500.00
  • JVCF1.50 Confirmation Flipper

    JVCF1.50 Confirmation Flipper

    Optometry Confirmation Flipper 1.50 – Dual Flip Lens Tool for…

    ₹500.00
  • Confirmation Flipper

    Confirmation Flipper

    Optometry Confirmation Flipper 1.50 – Dual Flip Lens Tool for…

    ₹500.00
  • Random Dot 2 Stereopsis Test Standard

    Random Dot 2 Stereopsis Test Standard

    Stereo depth perception tests are an effective and easy to…

    ₹500.00