Removable Blue Lens Filter for Penlights

The Removable Blue Lens Filter attaches to the end of a penlight, helping to measure pupil size accurately while eliminating distortion. 

• Easily attaches to the end of a disposable penlight (penlight sold separately)
• Enhances accuracy in measuring pupil size and reduces visual distortion during examinations
• Lightweight and easy to install for convenient use in medical settings

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