Effect of TrueTear Corneal Surface Imaging

Effect of TrueTear Use on Anterior Corneal Surface Imaging Quality

This study will evaluate the utility of TrueTear™ to improve anterior corneal surface imaging quality before cataract surgery, refractive lens exchange, or laser refractive surgery.

Corneal imaging will be repeated before and after TrueTear use during a single patient visit. Image quality measures will be compared.

Inclusion Criteria:

• Scheduled to undergo routine imaging for cataract surgery, refractive lens exchange or laser refractive surgery

Exclusion Criteria:

• A cardiac pacemaker, implanted or wearable defibrillator, or other implanted metallic or electronic device (e.g. cochlear implant) in the head or neck
• Chronic or frequent nosebleeds, a bleeding disorder (e.g. hemophilia), or another condition that can lead to increased bleeding
• A known hypersensitivity (allergy) to the hydrogel material that comes into contact with the inside of the nose during use of the TrueTearTM device
• Pregnancy
• Presence of any ocular disease or condition which in the investigator's opinion would confound the study results