I-PEN Tear Osmolarity System

I-MED Pharma


The I-PEN® Tear Osmolarity System
The New Standard for Diagnosing Dry Eye Disease

I-PEN®, the world’s only portable diagnostic device to detect and measure the tear film osmolarity levels associated with marginal, mild, moderate and severe Dry Eye Disease.

  • Quantitative measurement of osmolarity
  • Affordable point-of-care test
  • Quick and simple to use (Entire test can be done in seconds)
  • Reproducible, accurate and reliable results
  • Uses Single-Use-Sensors (SUS)


The I-PEN® Osmolarity System is a solid state electronic diagnostic device for the quantitative measurement of osmolarity (concentration of dissolved salts in solution) of human tears in normal and Dry Eye Disease patients..

The I-PEN® Osmolarity system, used in conjunction with the I-PEN® Osmolarity Single Use Sensors (SUS), provides a quick and simple method for determining tear osmolarity of the tissues bathed in the tear film of the orbital tissues such as the palpebral conjunctiva. After approximately 2 seconds of contact with the eyelid tissue, the I-PEN® will display a quantitative tear osmolarity test result on the liquid crystal display (LCD) in units of mOsms/L. No calculations required. The I-PEN® Osmolarity Test utilizes an impedance measurement to provide an indirect assessment of osmolarity of the tear film of the eye.

The I-PEN® is designed for use as an in-practice screening device both for patients presenting with dry eye symptoms and for all pre-and post-surgical patients. In addition, the I-PEN® is an invaluable asset for monitoring the progress of dry eye treatment therapies. The I-PEN® is for professional in-vivo diagnostic use only.