Description
Plastic
Beads
Nylon
String
Beads
wood
Therapeutic
heavier cords
Product description
- Purpose: The primary function is to quantify the degree of forward or backward displacement of the globe, which is vital for diagnosing and monitoring conditions such as thyroid-associated ophthalmopathy (Graves’ disease), orbital tumors, or the effects of trauma.
- Mechanism: The device consists of a horizontal bar with adjustable carriers that are placed against the patient’s lateral orbital rims. Each carrier contains 45-degree angled mirrors and a millimeter scale. The examiner uses the mirrors to align the apex (front surface) of the cornea with the scale, providing a measurement in millimeters.
| Topic | Discription |
| Purpose / Target Users | The instrument is used for precise measurement of exophthalmos (for example in cases of thyroid eye disease, orbital tumors) by measuring how far the eye (corneal apex) protrudes relative to the bony orbital rim.Target users: Ophthalmologists, oculoplastic surgeons, optometrists and clinics dealing with orbital/eyelid/thyroid cases. |
| Optotypes / Symbols | Not applicable for this device (it’s a measurement tool, not an acuity chart) and no symbols/letters are used. |
| Scaling / Spacing | While the instrument has a millimetre scale for protrusion measurement, the vendor listing for Hertel does not state the scale division, min/max, or any spacing details specific to JVHEX (only generic info from other models). |
| Range of Acuity / Line Sizes | Not relevant/applicable. This is not an acuity chart. |
| Testing Distance | The listing does not specify a required working distance, position of patient, or head rest details. For best accuracy you should know how the instrument is held relative to patient, but Hertel listing lacks that. |
| Physical Size & Portability | The Hertel listing does not supply full dimensions or weight for this specific model. The analogous specs above are for other models/brands. |
| Mounting / Display Features | The instrument is handheld/placed on the orbital rims; however, the listing doesn’t specify whether it comes with a chin‑rest, headstand, or how the patient is stabilized. |
| Included Accessories / Extras | On the Hertel listing: “Comes with protective metal storage case.” So at least the instrument plus case are included. |
| Durability / Material Qualities | The listing says “protective metal storage case,” but does not specify the materials of the frame/bars/mirrors (metal vs plastic, type of coating), nor lifespan, calibration guarantee, or wear resistance. |
| Usability / Marker of Quality | There is no mention of certifications (e.g., ISO/CE/FDA), calibration certificate, or user‑study feedback for specifically. Also, no user manual details are provided publicly on that listing. |
Reviews
There are no reviews yet.