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280000 Lea Flicker wand
The LEA Flicker Wand is 26.5″ (67.3 cm) long with a 20″ (50.8 cm) flexible wand with a diode at the end that can be used as either a flickering or non-flickering stimulus at 4, 40 and 400 cd/m2. The curved wand is moved from behind the person forward in all four quadrants of the…
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Product description
- The LEA Flicker Wand is 26.5 in (67.3 cm) long with a 20 in (50.8 cm) flexible wand with a diode at the end that can be used as either a flickering or non-flickering stimulus at 4, 40 and 400 cd/m2.
- The curved wand is moved from behind the person forward in all four quadrants of the visual field to detect losses in the periphery of the visual field.
| Topic | Discription |
| Purpose / Target Users | Purpose: To provide a handheld visual‐field/flicker stimulus to screen or estimate peripheral visual field loss, especially in children, non‐cooperative patients, or situations where full automated perimetry is impractical. The wand can be used as a flickering (or non‐flickering) stimulus at different luminance levels to detect peripheral field losses. Target users: Ophthalmologists, optometrists, orthoptists, vision‐screening settings, paediatric clinics, neurology/rehab settings where peripheral field assessment is needed quickly. |
| Optotypes / Symbols | Not a conventional optotype chart. Instead, the wand uses a light‐emitting diode stimulus (single point) that is moved through quadrants of the visual field while the patient fixates. So there are no letters or symbols in the usual acuity sense. The “symbol” is simply the flickering (or non-flickering) LED. |
| Scaling / Spacing | Because this device is used for peripheral visual field estimation, there is no typical “letter size/line spacing” metric. Instead: length of device is specified (26.5″/67.3 cm total; flexible wand section 20″/50.8 cm) which influences how far you can move the stimulus behind/around patient. The spacing here relates to movement of the stimulus in field quadrants, rather than fixed spacing of optotypes. |
| Range of Acuity / Line Sizes | Not applicable in the normal acuity sense. The wand does not provide multiple line sizes or acuity levels; instead it provides different luminance (stimulus intensities) and is used to detect peripheral field deficits. Manufacturer spec lists luminances 4 cd/m², 40 cd/m², 400 cd/m² at the diode end. |
| Testing Distance | The device is used at near distance behind/around a patient rather than standardized fixed distance like acuity charts. The instructions note: bend the flexible wand into an arc and bring forward from behind the head in all four quadrants; one example shows starting at ~40 cm from the child’s head. For more precise quantitative measurement you can use the wand on an arc perimeter, but for screening it’s a “sweep” technique. |
| Physical Size & Dimensions | Length: 26.5″ (67.3 cm) total. Flexible wand section: 20″ (50.8 cm). Curved design for movement behind patient. No detailed diameter or weight publicly given. |
| Mounting / Display Features | Handheld wand. The flexible wand section allows movement in different quadrants of the visual field. There is a diode at the end that can flicker or remain steady. No wall-mount or chart stand—this is a manual tool used by the examiner. Some instructions mention using on an arc perimeter for more precise measurement. |
| Included Accessories / Extras | The manufacturer listing mentions a guide/manual for the 280000 SKU. No major extra accessories (e.g., stands, carry case) are prominently listed in public spec. When purchasing check whether batteries, calibration sheet or recording forms are included. |
| Durability / Material Qualities | The wand is flexible and designed for repeated use in clinical/paediatric settings. The flexible section helps ease of use. The spec is minimal on materials, but the length and flexibility imply a robust design for clinical handling. For durability in India, check whether the diode is replaceable, the wiring is robust, and whether spare parts/batteries are available. |
| Usability | The wand is simple to use, handy for children and patients who cannot perform formal perimetry. The flicker/non‐flicker and different luminance levels add flexibility. |
| Marker of Quality | Recognised brand, clear specification, CE approval. The fact that professional catalogues list it as a visual-field tool also adds credibility. The specification of luminance levels and movement in quadrants shows thought-through design. For high quality, ensure that the light-diode output is stable, the wand flexes correctly, the length is correct, and instructions/training are available. Good marker of quality would be calibration/verification certificates, spare parts availability, and positive user feedback in paediatric/rehab settings. |
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