Experience precise and comfortable vision testing with this high-quality Optical Trial Lens Frame, designed for professional use in opticians’ offices, hospitals, schools, factories, and mining enterprises. Crafted to offer extensive adjustability and user-friendly features, this trial frame ensures accurate visual acuity examinations tailored to individual needs. Key Features: · Adjustable Pupil Distance: Easily customize the pupil distance from 48mm to 80mm, with left or right eye adjustment ranging from 24mm to 40mm, allowing precise alignment for diverse patients. · Versatile Lens Capacity: Supports up to 4 lenses inserted simultaneously into either the left or right frame, enabling comprehensive testing and flexible lens combinations. · Fully Adjustable Nose Pads: Nose pad height and tilt angle can be adjusted (length 0-14mm; angle 0°-30°) to maximize comfort and fit for most users, reducing pressure on the nose bridge. · Wide Range of Frame Adjustments: Monocular movement ranges from 25mm to 40mm; pupil distance, eye height, and ear height are all adjustable to ensure optimal positioning during examinations. · Precise Axial Rotation: Left index plate scales from 120°-0°-135°, right index plate from 45°-180°-60°, with 5° marking intervals, allowing accurate lens axis alignment with 360° rotation capability. · Superior Optical Accuracy: Features minimal non-parallelism (≤2.5°) between optical and geometric axes, with lens displacement and optical center deviation kept under 0.5mm and 0.3mm respectively, ensuring reliable and consistent test results. · Adjustable Glasses Legs: Length adjustable from 98mm to 135mm with a maximum spacing of 200mm between legs, accommodating various head sizes comfortably. · Lightweight Design: Weighing approximately 66.3g (2.3oz), this frame minimizes wearer fatigue, making it suitable for extended use during detailed eye examinations. Specifications: · Item Type: Optical Trial Lens Frame · Pupil Distance Adjustment Range: 48-80mm (both eyes), 24-40mm (single eye) · Monocular Movement Range: 25mm-40mm · Nose Pad Adjustment: Length 0-14mm, Angle 0°-30° · Axes Scale: Left 120°-0°-135°, Right 45°-180°-60°, with 5° intervals · Inner Frame Aperture: Φ32.5mm · Lens Capacity: Up to 4 lenses per side · Lens Rotation: 360° · Optical Alignment Tolerances: Non-parallelism ≤2.5°, Optical center deviation ≤0.5mm, Lens displacement ≤0.3mm · Glasses Leg Length: 98mm-135mm · Maximum Glasses Leg Spacing: 200mm · Net Weight: Approx. 66.3g / 2.3oz This Optical Trial Lens Frame combines precision engineering with ergonomic design to deliver reliable and comfortable visual acuity testing. Its extensive adjustability and robust construction make it an essential tool for eye care professionals seeking accuracy and ease of use in every examination.