Ocular Surface Disease Changes After iStent or iStent Inject Implantation With Phacoemulsification

Prospective Study of Ocular Surface Disease Changes After iStent or iStent Inject Trabecular Micro-Bypass Implantation With Cataract Surgery

This prospective interventional single-arm trial evaluates measures changes in ocular surface disease parameters in eyes with mild to moderate open-angle glaucoma (OAG) on 1-4 glaucoma medications who undergo phacoemulsification and trabecular micro-bypass stent(s) implantation (iStent or iStent inject).

This study enrolled eyes with mild to moderate open-angle glaucoma (OAG) on 1-4 glaucoma medications who were scheduled to undergo phacoemulsification cataract extraction and trabecular micro-bypass stent(s) implantation (iStent or iStent inject). Study participation entailed measurement of key ocular surface data through 3 months postoperative including Ocular Surface Disease Index score (OSDI), corneal/conjunctival staining (Oxford Schema), fluorescein tear break-up time (FTBUT), and conjunctival hyperemia (Efron Scale); these measures were collected alongside standard postoperative glaucoma evaluations such as number of glaucoma medications and intraocular pressure (IOP).

Inclusion Criteria:

1. Mild to moderate primary open-angle glaucoma
2. Currently treated with ocular hypotensive medication
3. Primary open-angle, pseudoexfoliative and pigmentary glaucoma are acceptable diagnoses
4. Subject scheduled to undergo cataract surgery in combination with one trabecular meshwork bypass stent
5. 22 years of age or older
6. Able and willing to attend scheduled follow-up exams for three months postoperatively
7. Able and willing to provide written informed consent on the IRB approved Informed Consent Form
8. Successful, uncomplicated cataract surgery
9. OSDI of 8 or more

Exclusion Criteria:

• 1. Primary angle-closure glaucoma; or secondary angle closure glaucoma, including neovascular glaucoma 2. Any pathology for which, in the investigator's judgement, the following would be either at risk or contraindicated:

  1. Cataract surgery
  2. Stent implantation
  3. Compliance to elements of the study protocol (e.g., ophthalmic examinations, follow-up visits) 3. Fellow eye actively enrolled in this trial 4. Current participation in any study, or participation within 30 calendar days of screening exam 5. Unsuccessful, complicated cataract surgery 6. OSDI of 7 or less