Pupil gauge pen light diagnostic penlight . Medical supplies instruments for optometrist , eye doctor , clinic , paramedic , and ophthalmologists . Diagnostic exam pen light with pupil gauge diagram picture has a pocket clip . Great promotional medical item giveaways for doctors , physicians , optometrist , ophthalmologist and paramedics . Disposable medical supplies instruments and flashlights . Eye pen lights are bright flashlights to dilate pupil for exam .