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Yellow Green Penlight
When purchasing, look for features relevant to your needs, such as rechargeable batteries, specific light modes, material durability (e.g., stainless steel or aluminum alloy), and specialized features like pupil gauges if intended for medical use
₹500.00
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Description
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Product description
- Medical Penlights: Many medical penlights offer both yellow and white light options. The yellow light is specifically designed to be gentler on the eyes during pupil examinations, reducing blue light hazard and avoiding patient discomfort, while the white light is used for examining the throat or other areas. These often feature a pupil gauge and ruler on the side for convenience.
- Green Light Penlights: Green light is popular among hunters and fishermen, and can also be useful for night observation as it does not attract as many insects as white light. Some multi-color tactical or utility penlights include a green LED mode.
| Topic | Discription |
| Catagory | Vision Therapy |
| Purpose / Target Users | The Yellow–Green Pen Light is a specialized handheld light source used in vision therapy,ocular health evaluation, and pupil response testing.The yellow-green LED light provides enhanced contrast sensitivity, making it useful for fixation tasks, pupil assessments, and tracking exercises, especially in low-light or controlled clinical settings.Target users include optometrists, ophthalmologists, vision therapists, school screening teams, and eye care professionals who need a bright but gentle fixation light for various tests and therapy activities. |
| Optotypes / Symbols | No optotypes or printed symbols are used. Instead, the narrow, high-contrast yellow-green light beam functions as a fixation target to help patients focus during tracking, pupillary, and binocular vision exercises. The unique color is especially effective for attracting attention and minimizing glare. |
| Scaling / Spacing | The pen light does not use printed scaling, but the controlled and focused LED beam allows the examiner to precisely adjust working distances and light placement, maintaining standardized testing conditions (e.g., for NPC and fixation tasks). The beam size remains uniform and narrow, aiding in accurate evaluations. |
| Range of Acuity / Line Sizes | Not applicable for acuity measurement. However, the bright yellow-green light can be used as a visual stimulus for accommodation, convergence, and tracking exercises at various distances (typically 5–40 cm), helping maintain consistent fixation without the need for charts or symbols. |
| Testing Distance | Pupillary Testing: Typically performed at 15–30 cm from the patient’s eyes to evaluate direct and consensual light reflexes. NPC (Near Point of Convergence) Testing: The light is moved from 40 cm toward the patient’s nose to measure convergence break and recovery points. Fixation / Tracking Exercises: Used at 40 cm or closer, moved horizontally, vertically, or diagonally to evaluate and train smooth pursuits and saccades. The yellow-green wavelength is particularly useful for maintaining patient focus during longer exercises. |
| Physical Size & Dimensions | Length: Approximately 13–15 cm (pen-shaped), Diameter: Around 1–1.5 cm Weight: Lightweight (20–30 g) for easy handling. The pen-style design allows for comfortable grip, precise pointing, and easy pocket storage. |
| Mounting / Display Features | Pocket Clip: Built-in clip for secure attachment to a coat, shirt pocket, or clipboard. No fixed mounting required — it is a handheld device for maximum flexibility in various clinical and therapy environments |
| Included Accessories / Extras | Batteries (AAA or AA) are typically included, depending on the model. Some units come with spare LED bulbs or a soft protective pouch. May feature a simple on/off push-button or clip switch for ease of use. |
| Durability / Material Qualities | Material: Crafted from high-grade aluminum or stainless steel, ensuring long-term durability and resistance to daily wear, corrosion, and cleaning agents. Finish: Smooth yellow-green outer finish for quick identification and professional presentation. LED: Energy-efficient, non-heating, and long-lasting LEDs ensure stable performance. – Resistant to frequent disinfection and rough clinical handling. |
| Usability / Marker of Quality | Lightweight, ergonomic design enables stable and precise light control with one hand. – Easy push-button or clip switch provides quick operation during patient testing.- Bright, focused yellow-green light – Widely used in professional optometry and vision therapy environments for its unique wavelength advantages, reliability, and clinical precision.offers superior visibility and attention without excessive glare. – Quality markers include: consistent light output, smooth switch function, strong battery life, and a robust metallic body. |
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