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Visionstar YZ-20T4

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Visionstar YZ-20T4
Visionstar YZ-20T4
Visionstar YZ-20T4
Visionstar YZ-20T4
Visionstar ENT, Ophthalmic & Sensory

Visionstar YZ-20T4

Surgeon and Assistant. One Light Path. The Same View.

The YZ-20T4 Operating Microscope from Visionstar is a two-operator ophthalmic microscope sharing one light path, with five-step main magnification, three objectives, a red reflex intensifier and retina protection. Medigear.uk supplies it to ophthalmic theatres and day surgery units, confirming bulb changeover provision and certification before order.

Sections
Ophthalmic Microscopes
Categories
ENT, Ophthalmic & Sensory
Condition
New
Origin
China
Seller Type
Certified Professional Seller
Size:
1310 × 800 × 360 mm
CE & ISO Certified
Global Shipping
Supplier: Medigear
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The YZ-20T4 is a double-binocular ophthalmic operating microscope built around a single design decision: the surgeon and the assistant share the same light path.

That matters more than a specification line suggests on microscopes where the assistant views through a separate optical path; the assistant sees a compromised image from a different angle, often with reduced stereopsis. A shared path means the assistant observes the same stereo image as the surgeon, which is what makes genuine assisting and meaningful teaching possible rather than approximate. The assistant microscope locks at 90 degrees to either side, and with the oblique illumination device removed,i t repositions to 180 degrees for opponent working.

The illumination system is specifically configured for ophthalmic work. A red reflex intensifier is fitted, which is critical in cataract surgery, where capsulorhexis and cortical removal depend on red reflex quality. A retina-protecting device and infrared and ultraviolet filters guard the patient during prolonged exposure, and the cold light source limits heat at the tissue. Coaxial illumination is rated at 50,000 lx or above and oblique at 45,000 lx or above, with the oblique channel doubling as slit illumination at adjustable width.

Optically, the main microscope offers five magnification steps and the assistant three, across three objectives at f200, f250, and f30,0, giving working distances of 190, 240, and 290 mm. Maximum resolution is 112 L,P/mm with fields of vranging iew from 58own to 9 mm, and lenses are multi-coated, anti-reflec,tion and mildewproof.

An internal beam splitter connects a teaching tube and CCD or video system. Foot pedal control covers magnification, focusing, horizontal movement and illumination, with X/Y movement that centres automatically. Medigear.uk confirms bulb changeover provision, certification and installation requirements before supply.

Cataract services are the primary setting, and the red reflex intensifier is why. Anterior segment work is judged largely against the retinal reflex rather than by direct illumination, so a system that enhances it as an integral part of the light path affects the whole procedure rather than one step of it. Coaxial illumination rated at 50,000 lx or higher supports that, while the retina-protecting device and infrared and ultraviolet filters address prolonged exposure. Medigear.uk supplies the manufacturer's illumination documentation with the unit, and all surgical technique and clinical judgement remain with the operating surgeon.

Teaching and training units benefit more than any other setting from the shared light path. Because the assistant observes the same stereo image rather than a compromised secondary view, a trainee sees what the surgeon sees, and the beam splitter takes the teaching tube and video feed from the same optics. Which accessories form part of the supply are confirmed in the quotation.

Units performing hand, orthopaedic or reconstructive work alongside ophthalmic lists gain from the three objectives. Working distances of 190, 240 and 290 mm suit different procedures and different instrument clearance requirements, and the manufacturer states applicability beyond ophthalmology on that basis. A unit serving more than one speciality also justifies its capital across more lists.

Theatres and day surgery units should plan installation early. The stand arrives at 210 kg gross in a crate measuring 1310 mm on its longest side, so delivery route, door widths,s and step access all need to be assessed before scheduling. Medigear.uk establishes access and installation requirements before delivery.

The Assistant Sees What the Surgeon Sees

A shared light path means the assistant observes the same stereo image rather than a secondary view from a different angle with reduced depth perception. That is the difference between genuine assisting and approximate assisting, and between teaching that shows the procedure and teaching that suggests it.

Red Reflex Intensifier for Anterior Segment Work

Cataract surgery is largely judged against the retinal reflex, and an intensifier built into the illumination path affects the entire procedure rather than a single step. Having it integral rather than as an accessory means it is available on every case without setup.

Retina Protection Built Into the Light Path

A retina-protecting device with infrared and ultraviolet filters and a cold light source together addresses the prolonged high-intensity exposure associated with surgery. These are patient safety provisions rather than image quality features, and they operate without the surgeon selecting them.

Three Working Distances From Three Objectives

The f200, f250, and f300 objectives provide working distances of 190, 240, and 290 mm. Longer clearance leaves more room above the field for instruments and hands; shorter gives higher magnification at the same step. Matching the objective to the surgeon, rather than to the room, is the right way round.

Oblique Illumination Doubles as an Adjustable Slit

The oblique channel functions as slit illumination with adjustable width, providing a second illumination technique without a separate device. Slit illumination reveals contour and depth that flat coaxial light renders less distinctly.

Assistant Scope Repositions to Suit the Theatre

The assistant microscope locks at 90 degrees to either side, and at 180 degrees for opposite working once the oblique illumination device is removed. Theatre layout and procedure type both dictate where an assistant stands, and a fixed position constrains both.

Teaching and Recording From the Same Optics

An internal beam splitter feeds a teaching tube and CCD or video system from the primary optical path rather than a separate view. For a training unit or a service documenting procedures, image provenance matters as much as image quality.

Bulb Changeover Provision Confirmed Before Order

The instrument uses a 12 V / 100 W halogen bulb, and whether a standby bulb with rapid changeover is fitted is not stated. On a surgical microscope, a bulb failure mid-procedure is a materially different event from one in a clinic room. Medigear.uk obtains the answer in writing, along with bulb life and spare availability.

Shared Light Path for Two Operators

Surgeon and assistant observe through the same optical path, giving both the same stereo image rather than a primary and a compromised secondary view.

Assistant Microscope Repositioning

The assistant scope locks at 90 degrees to either side of the main scope, and at 180 degrees for the opponent working with the oblique illumination device removed.

Main Microscope: Five-Step Magnification

Five steps are provided: 4x to 25x on f200, 3.2x to 20x on f250, and 2.7x to 17x on f300.

Assistant Microscope: Three-Step Magnification

Three steps are provided: 6x to 16x on f200, 5x to 12.8x on f250, and 4.2x to 11x on f300.

Three Objectives with Three Working Distances

Objectives at f200, f250, and f300 provide working distances of 190, 240, and 290 mm. These are supplied as standard and are confirmed in the quotation.

Eyepiece and Dioptre Adjustment

Eyepieces are 12.5x/18B with ±7 D adjustment, allowing operators to work without spectacles where preferred.

Pupil Distance Range

Interpupillary distance adjusts from 50 mm to 75 mm, covering the range required across different operators.

Maximum Resolution and Field of View

Maximum resolution is 112 LP/mm, with fields of view of 58, 38, 23, 14 and 9 mm across the magnification range.

Red Reflex Intensifier

The illumination system incorporates a red reflex intensifier, integral to the light path rather than supplied as an accessory.

Retina Protection Device

A retina-protecting device forms part of the illumination system, addressing prolonged exposure during surgery.

Infrared and Ultraviolet Filters

Infrared and ultraviolet filtering is fitted, with a cold-reflection light source limiting heat reaching the tissue.

Coaxial and Oblique Illumination

Coaxial illumination is rated at 50,000 lx or above and oblique at 45,000 lx or above, from a 12 V / 100 W medical halogen source.

Oblique Illumination as Adjustable Slit

The oblique channel functions as slit illumination with adjustable width, giving a second technique without additional equipment.

Beam Splitter for Teaching and Video

An internal beam splitter connects a teaching tube and CCD or video system from the primary optics. Accessory supply and video interface are confirmed at quotation.

Foot Pedal and X/Y Movement

Foot control covers magnification, focusing, horizontal movement and illumination, with X/Y movement that centres automatically.

Bulb Specification and Changeover Provision

The 12 V / 100 W halogen bulb is a consumable with a side access door for replacement. Standby bulb provision, bulb life and spare availability are obtained in writing.

Packed Dimensions, Weight and Certification

The unit ships at a gross weight of 210 kg in a 1310 × 800 × 360 mm crate. Listings reference CE, FDA, and ISO 9001 on some, and Medigear.uk obtains documentary evidence specific to this model.

The YZ-20T4 Operating Microscope is a double-binocular ophthalmic instrument designed so that the surgeon and assistant share one light path and therefore one stereo image, with five main magnification steps and three assistant steps across f200, f250, and f300 objectives, giving 190, 240, and 290 mm of working distance. A red-reflex intensifier, retina-protecting device, and infrared and ultraviolet filters configure the illumination specifically for anterior segment work. In contrast, oblique illumination serves as both an adjustable slit and an internal beam splitter that feeds a teaching tube and video from the primary optics. That suits cataract services, teaching and training units, and theatres running hand or reconstructive work alongside ophthalmic lists. Bulb changeover provision, delivery access, objective supply and model-specific certification are all confirmed in writing before order. Contact Medigear.uk for specifications, procurement assistance, or expert consultation.

FAQ

Frequently Asked Questions

Everything buyers need to know about sourcing medical equipment through MediGear.

The YZ-20T4 is a double-binocular ophthalmic operating microscope for two operators sharing a single light path, mounted on a floor-standing mobile stand. It offers five main magnification steps and three assistant steps across f200, f250 and f300 objectives, with a red reflex intensifier, retina protection and a beam splitter for teaching and video. Medigear.uk confirms the specification before order.

Because it determines what the assistant actually sees. Where the assistant views through a separate optical path, the image comes from a different angle with reduced stereopsis, so assisting becomes approximate and teaching less useful. A shared path gives the assistant the same stereo image as the surgeon. Surgical technique and all clinical judgement remain with the operating surgeon.

It enhances the retinal reflex, making anterior lens structures visible during surgery. Cataract work depends on it, since capsulorhexis and cortical removal are judged against the red reflex rather than by direct illumination alone. Having it as an integral part of the illumination system rather than an accessory is the relevant point.

The illumination system incorporates a retina-protecting device, infrared and ultraviolet filters, and a cold light source to limit heat reaching the tissue. Prolonged high-intensity exposure during surgery is the risk these address. Medigear.uk supplies the manufacturer's documentation covering the illumination system with the unit.

Working distance follows the objective: f200 gives 190 mm, f250 gives 240 mm, and f300 gives 290 mm.A longer working distance leaves more clearance above the field for instruments and hands, while a shorter one provides higher magnification at the same step. This is a surgeon's preference rather than a room constraint, and Medigear.uk confirms which objectives are part of the supply.

The main microscope provides five steps and the assistant three, varying by objective. On f200 the main steps are 4x, 6x, 10x, 16x and 25x; on f250 they are 3.2x through 20x; and on f300 they run 2.7x to 17x. Assistant steps sit within that range. Maximum resolution is 112 LP/mm.

Yes. An internal beam splitter connects a teaching tube to a CCD or video system, using the same optics rather than a secondary view. Which accessories form part of the sthe upply and which are optional are confirmed in the quotation, along with the available video interface.

This is the question to settle before purchase. The instrument uses a 12 V / 100 W halogen bulb, and the manual describes a side door for replacement. Whether a standby bulb with rapid changeover is fitted is not stated, and on a surgical microscope that provision matters considerably. Medigear.uk obtains the answer in writing along with bulb life and spare availability.

The unit is a floor-standing mobile stand, arriving at 210 kg gross in a 1310 × 800 × 360 mm crate, so the delivery route, door widths, and any steps need to be assessed beforehand. Mains supply, room layout and theatre positioning are confirmed during planning. Medigear.uk establishes access and installation requirements before delivery is scheduled.

Listings consistently reference CE, with FDA and ISO 9001 appearing on some. Because this is a surgical device, Medigear.uk obtains documentary evidence specific to this model and confirms the marking and registration position applicable to supply. Warranty is quoted at twelve months, and terms are issued in writing with the quotation.