Effect of TrueTear Corneal Surface Imaging

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