Streak retinoscope YZ24D, update version for YZ24B

Streak Retinoscope YZ24D — Professional Refraction Assessment Made Simple

1. Product Overview

1.1 Product Name & Model Specification

1.2 Scope of Application

The YZ24D Streak Retinoscope is a precision medical optical instrument engineered for examining the refractive state of the human eye. It is an essential tool for eye care professionals, optometrists, and ophthalmologists who demand accurate and reliable refraction assessment in clinical or screening settings.

1.3 Product Performance & Key Features

The YZ24D Streak Retinoscope utilizes a halogen tungsten light source that delivers consistent, high-quality illumination for precise examination. Here's how it works:

• Optical Projection System: The light beam from the halogen tungsten source passes through the projection mirror and is then reflected by a mirror into the fundus (retina) of the person being examined.
• Adjustable Illumination: The illuminance can be conveniently controlled by adjusting the dimmer knob, allowing you to adapt to different examination conditions.
• Refraction Assessment: The light projected into the examinee's eye enables you to determine their refractive state based on the movement of the reflected light — a proven, time-tested technique.

Beyond its clinical performance, the YZ24D is designed with the user in mind:

• Convenient charging — ready when you need it
• Beautiful appearance — professional and modern design
• Comfortable hand feel — ergonomic grip for extended use
• Easy to carry — portable for mobile practice and house calls

1.4 Main Structure

The YZ24D Streak Retinoscope is composed of three primary components:

1. Optical Component — the precision optical assembly for light projection and reflection
2. Handle — ergonomically designed for comfortable handheld operation
3. Power Adapter — for convenient charging and reliable power supply

1.5 Technical Specifications

3. Component List

Table 1 — List of Parts

YZ24D New Streak Retinoscope - Key Upgrades

1. Brand-New Optical Quality Enhancement
Streak sharpening technology delivers superior stray light elimination, brighter and more uniform illumination, and straighter light paths for more accurate retinoscopy results.

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. New Structural Design
Avoids finger-pressure spring force to maintain band width - operations are now more effortless and precise.

5. Upgraded Optical Design
Maximum illumination intensity increased by 30%, making it more suitable for high myopia and high hyperopia shadow observation.

YZ24D - Detailed Feature Breakdown

New Streak Rotation & Width Adjustment Mechanism

• Rotational module with damping design prevents unintended up-down sliding
• Front and rear window interfaces enable two-finger operation for greater stability and precision
• Eliminates the need for finger-pressure spring force to maintain band width - smoother, easier operation

30% Higher Maximum Illuminance

The YZ24D streak retinoscope now delivers up to 30% higher light spot illuminance compared to the previous YZ24B model. This improvement is particularly beneficial for:

• High myopia cases - deeper penetration for accurate refractive assessment
• High hyperopia cases - clearer shadow observation at greater working distances
• Patients with opaque refractive media - such as corneal edema, cataracts, or vitreous opacities