Envi
Envi HSL-20 Slit Lamp
Two-magnification tower slit lamp with 10x and 16x drum selection, the standard lamp in Envi's Essentials exam lane package.
Overview
The HSL-20 covers routine anterior segment examination with a convergent binocular microscope and two drum-selected magnifications. Vertical slit tilt to 20 degrees, continuously adjustable slit length, and generous base travel handle the everyday exam, and its place in the Envi Essentials Package makes it the default lamp in Envi lane buildouts.

Key capabilities
Convergent binocular microscope with 12.5x eyepieces
Two drum-selected magnifications: 10x and 16x
Vertical slit tilt at 0, 5, 10, 15, and 20 degrees
Continuously adjustable slit length
Included in the Envi Essentials exam lane package
Technical specifications
Figures below come from current Envi product material. Confirm configuration-specific details with us before purchase.
| Magnifications | 10x and 16x with 12.5x eyepieces |
|---|---|
| Field of view | 36, 22, 14, 9, and 5.6 mm |
| PD range | 48.5 to 80 mm |
| Working distance | 75 mm |
| Slit tilt | 0, 5, 10, 15, 20 degrees vertical |
| Minimum slit opening | 0 mm; continuously adjustable length |
| Base travel | 103 mm longitudinal, 100 mm lateral, 35 mm vertical |
| Objective working angle | 12 degrees |
Who this is a good fit for
If none of these describe your practice, it is probably not the right choice, and we will tell you that.
Routine anterior segment examination
New lane buildouts on the Envi Essentials Package
Second lanes and satellite offices
What to ask on a demo
A demo is worth more when you arrive with your own cases and a list of questions. Here is what we would raise.
- Compare 10x and 16x against the magnifications you actually use
- See it mounted on the Switch or S2-S stand you are considering
- Ask about the ZSL-50 if you want five magnifications
How Blue River Medical supports the Envi HSL-20 Slit Lamp
Equipment consultation and model selection
On-site or in-office demo
Installation coordination
Staff training
Workflow planning around your existing lane
Ongoing customer support and service coordination
Trade-in discussions when you are replacing equipment
We serve eye care practices across Colorado, Arizona, New Mexico, Wyoming, and Utah. Service and repair responsibility differs by manufacturer and model, so ask us what we handle directly and what we coordinate with the manufacturer. See service and maintenance for our general equipment service capabilities.
For the manufacturer's own material, see the official Envi product page.
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Ask about Envi HSL-20 Slit Lamp pricing, schedule a demo, or start a trade-in conversation. We will come back with specifics for your practice.
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Call Us: (877) 707-5688