Direct Ophthalmoscope YZ11E, update version for YZ11D

Direct Ophthalmoscope YZ11E – Professional Eye Examination Made Simple

1. Overview

1.1 Product Name & Model Specification

• Product Name: Direct Ophthalmoscope
• Model Specification: YZ11E (Updated Version of YZ11D)

1.2 Scope of Application

The YZ11E is engineered to examine both the external and internal structures of the eye, with a particular focus on the refractive media and the fundus. It is an essential diagnostic tool for routine eye examinations, clinical assessments, and detailed fundus evaluations in ophthalmology and general practice.

1.3 Product Performance & Features

The YZ11E direct ophthalmoscope utilizes a high-quality halogen tungsten light source, delivering reliable and consistent illumination for accurate diagnostics. It features:

• 6 types of diaphragms for versatile examination needs
• 2 types of filters to enhance visualization
• 24 types of compensating lenses (diopter compensating lenses) for precise focus adjustment

The device integrates an illuminating system, an observation system, and viewing lenses that allow the observer to visualize the patient's eye directly—without the formation of an intermediate image. This direct optical path ensures clear, real-time observation for accurate diagnosis.

1.4 Main Structural Components

The YZ11E direct ophthalmoscope is composed of three main parts:

• Optical head
• Handle
• Power adapter

1.5 Technical Characteristics

3. Component List

4. How to Use the Direct Ophthalmoscope

4.1 Usage Environment

1. Darkroom – for optimal contrast and pupil dilation
2. Temperature: 5°C to 40°C
3. Relative Humidity: 30% to 75%
4. Atmospheric Pressure Range: 70kPa to 106kPa
5. Altitude: ≤3000m

YZ11E New Direct Ophthalmoscope – Key Upgrades

1. Brand-New Optical Structure Design
The color filter disc and functional diaphragm adopt a layered structure, ensuring versatile observation capabilities for diverse clinical needs.

2. Enhanced Operation Experience
Evolved precision operation experience for improved handling and control.

3. New Charging Base Design
Desktop-close center-of-gravity design with negative-pressure suction cup for stable placement; durable charging interface ensures reliable power supply.

4. Upgraded Diaphragm Disc Functions
Large, medium, and small spot sizes better match diverse usage habits; precision grid spot and new semi-circular spot are optimized for clinical requirements.

5. Upgraded Optical Design
Maximum illumination intensity increased by 30%, providing clearer fundus observation.

YZ11E – Detailed Feature Breakdown

New Optical Path Design

The YZ11E features a redesigned layered structure with separate color filter disc and functional diaphragm disc, replacing the older integrated design. This separation ensures more versatile and efficient observation across a wider range of clinical scenarios.

Ergonomic Grip Posture Adjustment

The new dial structure allows the thumb to operate all rotary dials – a significant improvement over the previous model where the thumb operated the power dial and the index finger operated the diaphragm dial. This unified thumb operation significantly improves efficiency and reduces hand fatigue during extended examinations.

Significance of Increased Brightness Upper Limit

The 30% boost in maximum brightness is clinically significant in the following scenarios:

• Opaque Refractive Media – When patients present with corneal edema, cataracts, or vitreous opacities, increased brightness helps penetrate opaque areas to ensure adequate light reaches the retina.
• Peripheral Retinal Examination – After pupillary dilation (e.g., using tropicamide), higher brightness enables clear observation of the peripheral retina and ora serrata while reducing light scatter interference.
• Use with Special Filters – When using red-free filters (green filters), which significantly reduce light intensity entering the fundus, the increased brightness compensates to enhance retinal vessel-to-background contrast, aiding detection of hemorrhages and microaneurysms.