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JVBO Black Occluder
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JVBO Black Occluder

Black Handheld Eye Occluder for Eye Exams Plastic Eye Instruments for Eye Chart Exam

₹500.00

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SKU: JVBS510-1-1-1-1-1-3-1-1-1-1-1-1

Description

Plastic

Beads

Nylon

String

Beads

wood

Therapeutic

heavier cords

Product description

  • Shaped to cover either eye without pressure during an eye examination durable, light and large enough to easily cover the eye.
  • Constructed of thick black plastic with smoothly finished edges.
  • Use with the eye chart, always pay attention to the condition of the eyes.
  • Fit for all people,Preschool / kindergarten children, school children / adolescents, adults, and the elderly.It’s a must for family ,school and hospital.

TopicDiscription
PurposeThe primary purpose of a black occluder is to completely occlude (block) one eye or part of the visual field during vision/ocular testing. For example: when performing monocular visual acuity tests, cover/uncover tests, motility assessments, or when isolating one eye’s function.
Target usersOptometrists, ophthalmologists, orthoptists, vision therapists, children or adult patients in clinics, screening camps.
It’s used when you don’t want any light or form vision through the occluded eye — in contrast to translucent or frosted occluders which allow light or partial observation. For example: the listing for the black clip-on says “The black filter does not let any light through.”
It is also used in binocular vision work or suppression checks: complete occlusion ensures that the covered eye is not influencing the fellow eye/vision via peripheral input.
It is suitable for general vision screening, pediatric clinics, and any scenario where full occlusion is required rather than partial.
Optotypes / SymbolsUnlike charts which present optotypes (letters, symbols, Landolt rings), the black occluder itself is a tool and does not present optotypes or symbols.
It is used in conjunction with optotype charts/tests: you cover one eye with the occluder while the other eye reads the chart.
Therefore, for the occluder: there are no “symbols” per se, but one may consider features such as handle, paddle/cup shape, hole/pinhole variants.
Some versions include pinholes (but those are not pure “black occluder” but have variants) and are used for special acuity assessments. In the black occluder product we’re reviewing, optotypes are not relevant.
Scaling / SpacingBecause the occluder is not presenting optotypes, standard scaling/spacing metrics (as in acuity charts) are not applicable.
However, some physical design aspects matter:
The cup radius or paddle size must be adequate to fully cover the eye/orbit so no stray light or form vision passes. For example: a model states “occluders are cupped to a 70 mm radius.”
Handle length and paddle-width/diameter determine ergonomic spacing from clinician/patient and control.
SizeAs with scaling/spacing: the black occluder itself doesn’t define a “range of acuity” or “line sizes” because it isn’t a visual acuity chart.
The occluder’s function is to enable the testing of acuity of the fellow eye by blocking one eye. So it supports the acuity test rather than providing the acuity gradations itself.
In some special occluders (like pinhole occluders) you might infer potential acuity changes, but for a standard opaque black occluder: this field doesn’t apply.
Testing DistanceThe testing distance is determined by the visual acuity or other eye test being performed (e.g., 6 m or 20 ft for distance acuity, 40 cm for near). The occluder simply covers one eye during that test.
The occluder does not change the test distance; it is a handheld tool used at that distance. For example the paddle length may allow the clinician to comfortably hold it at a standard distance.
Therefore: the standard testing distance remains as per the vision test protocol; the occluder is simply introduced at that distance.
DimensionsPaddle/cup diameter: about ~5-6 cm (50-70 mm) to cover orbit.
Length of handle + paddle: about ~17-25 cm depending on model (short/long).
Weight: light (e.g., ~25g for one model).
Material: plastic/ABS.
Thickness: a few mm (e.g., 0.5 cm in one example).
When procuring for your setting (e.g., looking at supply in India), check: paddle diameter, handle length, cup radius, weight, finish to suit your exam room ergonomics.
MountingMost black occluders are handheld paddle tools — they are held by the examiner/clinician in front of the patient’s eye.
There is typically no fixed mounting (wall, stand) since it needs to be moved for each patient and orientation. For example the model “Black, hand-held occluder” states handheld.
Some variants: clip-on occluders (for spectacle mounting) in black opaque style exist (see clip‐on example below). For example: “Lightweight clip-on occluder … The black filter does not let any light through.
AccessoriesFor standard black occluder models, included accessories/extras are typically minimal — it’s a single tool.
Dual‐ended paddle (one end black occluder, other side pinhole or Maddox rod) – e.g., one model: “Black Occluder/Maddox Rod Occluder” – black on one end, red Maddox rod on the other.
Clip-on variants (with clips to fit spectacles) – as noted above.
Short vs long handle versions to suit different exam types (distance vs near).
Some packaging might include protective pouch or case (though not always mentioned).
When ordering, check whether extras (e.g., multiple heads, spare paddles, clip mounting) are included or available as options.
Durability / Material QualitiesQuality black occluders are made from durable, lightweight plastic (often ABS) and designed for repeated use in clinic settings. Example: “moulded from strong, lightweight ABS plastic, with an easy cleaning gloss finish.”
Finish: A good occluder will have a smooth surface, rounded edges, no sharp corners (important for patient comfort). Example: “smooth, rounded shape … with no sharp edges.”
Cleaning / hygiene: It should be easy to clean/disinfect. Example: “Clean with water or non-solvent cleaners.”
Cupped design helps keep the paddle away from eyelashes/eyelids, reducing contact and wear.
Durability markers: withstand frequent handling, repeated disinfection, no warping, maintain opaque coverage (no light leakage).
One specification: “can be sterilized with any non-solvent-based germicide.”
Material qualities to look for: opaque plastic (no light pass-through), sturdy handle-paddle junction, consistent cup radius, non-reflective finish (to avoid glare).
UsabilityThe occluder should be comfortable for both patient and clinician: handle length appropriate for reach, paddle/cup large enough to fully block the eye, cup design offering clearance for lashes/eyelids so the eye remains open.
The blackout effect should be immediate and complete (no light leaks, no form vision).
The tool should be lightweight yet sturdy, and the handle should allow stable positioning without causing operator fatigue.
Hygiene: smooth surfaces, minimal seams, easy to clean/disinfect, durable under clinic usage.
Versatility: options for clip-on (for patients with glasses) or dual-ended models increase usability.
Comfort for the patient: rounded edges, cup design, minimal shading from surrounding face/hand.
Marker of QualityGood materials (ABS or equivalent heavy-duty plastic) rather than very thin or brittle plastic.
Well-designed ergonomic handle and paddle geometry (cup radius, width). For example: a cup radius of ~70 mm is noted in one high-quality model.
Gulden Ophthalmics
Effective full occlusion (black finish, no light pass, well-fitted cup).
Clean finish and no distracting reflections.
Proven brand or supplier (e.g., recognized ophthalmic equipment companies).
Clear dimensions/specifications included (so you know exactly what you’re getting).
Good after-sales support/spares or accessories (though rare for this simple tool).
Good user feedback—clinic users reporting longevity, ease of cleaning, comfort for patients.
If possible, check that the occluder meets relevant region’s medical device standards (depending on your country).

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