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Hertel Exophthalmometer
JUTRON VISION Hertel Exophthalmometer | Stainless Steel Eye Measurement Tool for Exophthalmos 0-35mm | 80-120mm Pupil Distance Range | Includes Brackets & Prisms in Protective Metal Case
₹500.00
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Description
- Precision Eye Proptosis Measurement: Designed for accurate measurement of exophthalmos (proptosis) in ophthalmology, the Hertel Exophthalmometer offers a 0–35mm measuring range, allowing clinicians to monitor orbital changes with precision. Ideal for diagnosing thyroid eye disease and orbital pathologies
- Adjustable Pupil Distance for Accurate Readings: Accommodates pupil distances from 80-120mm, ensuring compatibility with a wide range of patients. The design offers a clear, easy-to-read scale and ensures symmetrical measurement for reliable results during clinical eye assessments
- Durable Stainless Steel Construction: Crafted from high-grade stainless steel, the device is corrosion-resistant, hygienic, and built for long-term use in clinical environments. Its sturdy yet compact design (240×68×23.5mm) and lightweight (420g) make it practical for daily use
Radiologic Exophthalmometry
- Radiologic exophthalmometry utilizes computed tomography (CT) to provide an objective measurement of proptosis. Multiple techniques exist for measuring proptosis with CT. In one method, a horizontal line is drawn between the lateral orbital rims that bisects the lens in the axial plane. A perpendicular line is then drawn to the apex of the cornea and measured.
- In another method, a line is drawn between the lateral and medial orbital rims on each side that bisects the lens in the axial plane. A perpendicular line is then drawn to the apex of the cornea and measured.
- In the last method, a line is drawn between the superior and inferior orbital rims that bisects the lens in the sagittal plane. A perpendicular line is then drawn to the apex of the cornea and measured.
| Topic | Discription |
| Catagory | Pediatric Opthalmology |
| Material | 1) Mainly made of metal — the frame, beam, and supports (footplates) use metal so that it’s rigid and durable. 2) Includes mirrors (glass or optical mirror surfaces) set at 45° so you can see the corneal apex and scale. |
| How to use for | It measures how far the eyes stick out from the face — helpful in spotting eye problems like thyroid eye disease or tumors. |
| Built-in Mirrors | The mirrors let the doctor see both the scale and the eye reflection at once, making it easier to get accurate readings. |
| Durability | Built with strong metal parts and tough mirrors, so it holds up well under normal clinic use. |
| Unique Selling Proposition (USP) | Includes a protective case, works for both kids and adults, and is lightweight — perfect for busy eye clinics. |
| Purpose / Use-Case | Measures proptosis (forward displacement of the eyeball) or exophthalmos. Useful in thyroid eye disease, orbital tumors, trauma, any condition where eye protrusion needs to be quantified. Also helpful in tracking changes over time — e.g. comparing measurements over weeks/months to see progression or response to treatment. |
| Measurement Principle / Landmarks | Uses the lateral orbital rim (outer bony margin of the eye socket) as a reference point. Measures the distance from that orbital rim to the apex of the cornea |
| Scale / Measurement Range | Typical reading range for proptosis: 0 to 35 mm from corneal apex to orbital rim. Base (distance between the two temporal orbital rims) scale: from about 75 mm to 121 mm for some models |
| Physical Dimensions & Weight | Example “Lightweight” version: about 25 × 7 × 2 cm. Weight ~ 117 grams for the lightweight version.. There is a “Heavy Duty” version that is heavier (~216 grams) with metal parts |
| Material / Construction | Usually metal components (mirrors, bars) and durable frame. Heavy duty ones are mostly metal. Mirrors (angled) used to allow viewing the corneal apex and the scale simultaneously |
| Accessories / Packaging | Many units come with a protective case (leather or metal) for safe storage. Instructions included. |
| Durability / Use Lifetime | Metal and precision parts mean it can withstand frequent clinic use, not brittle. Heavy duty models more rugged. |
| Accuracy / Reproducibility Considerations | Measures should be done with consistency: same instrument, same observer, same base setting for comparing over time, Possible sources of error: asymmetry of orbital rims, positioning errors, parallax if the observer’s viewing angle shifts. |
| Readability / Scale Display | Scale markings in millimeters, clear on both “halves” of the instrument. The dual-scale / mirror halves allow simultaneous reading for both eyes, The base scale (distance between rims) also visible |
| USP / What Sets It Apart | Very well-established / standard instrument in ophthalmology and oculoplastics; has been used for decade, Provides objective, quantitative measure of eye protrusion, enabling tracking of progression or improvement. Helps in differentiating bilateral vs unilateral exophthalmos; helps detect asymmetry. Portability: lightweight model usable in clinics or field; heavy duty version gives extra durability. |
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