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Cornea Preservation Time Study

Principal Investigator

Sonia Yoo

Clinical Trial ID

Institutional Protocol # 20111088
National Clinical Trials Identifier NCT01537393

Clinical Trial Summary


Phase 4

Funding Agency/Sponsor




Enrollment Eligibility

Study Participant Eligibility Criteria
- Study Participant Inclusion Criteria
1. Age range 30-<91 years with minimum life expectancy of at least 3 years.
2. Willingness to return for follow-up study visits at 1 day, 1 week, 1 month, 6
months, 1 year, 2 years and 3 years.
3. Fluent in English or Spanish.
- Study Participant Exclusion Criteria 1) Decisionally and/or cognitively impaired
Study Eye Eligibility Criteria
- Study Eye Inclusion Criteria
1. Endothelial keratoplasty (EK) is scheduled between 10 and 60 days after
- The 10-day requirement relates to the need to be able to randomly assign the
eye to either intervention group.
- The 60-day requirement relates to the need to have current eligibility and
enrollment data at the time of surgery. If surgery is postponed to >60 days
after the initial enrollment visit, a new Baseline Visit and eligibility
assessment will have to be performed.
2. Presence of a condition related to endothelial dysfunction which will be treated
by EK.
- Eligible indications for EK include:
- Presence of Fuchs endothelial corneal dystrophy (FECD) meeting at least one of
the following:
- Phakic FECD
- Phakic FECD with cataract
- Triple procedure including EK for FECD, cataract extraction and
posterior chamber intraocular lens implantation (IOL) is allowed
- Aphakic FECD
- Pseudophakic FECD with posterior capsule supported, suture-fixated, or
sulcus-supported posterior chamber IOL
- Aphakic or pseudophakic corneal edema with posterior capsule supported,
suture-fixated, or sulcus-supported posterior chamber IOL without FECD
- Study Eye Exclusion Criteria
1. Prior EK
2. Indication for surgery that is not suitable for EK (e.g, keratoconus, stromal
dystrophies and scars)
3. Presence of a condition that has a very high probability for failure (e.g.,
failed EK or Penetrating Keratoplasty (PKP), heavily vascularized cornea,
uncontrolled uveitis)
4. Other primary endothelial dysfunction conditions including posterior polymorphous
corneal dystrophy and congenital hereditary corneal dystrophy
5. Anterior chamber IOL in study eye prior to or anticipated during EK
6. Planned intraocular lens exchange of an anterior chamber IOL with a posterior
chamber IOL in study eye at time of study EK
7. Pre-operative central sub-epithelial or stromal scarring that the investigator
believes is visually significant and could impact post-operative stromal clarity
8. Stromal vascularization that is visually significant (by investigator's judgment)
9. Presence of anterior synechiae (iris to cornea)
10. Peripheral anterior synechiae (iris to angle) in the angle greater than a total
of three clock hours
11. Hypotony (Intraocular pressure <10 mm Hg)
12. Uncontrolled (defined as intraocular pressure > 25mm Hg) glaucoma with or without
prior filtering surgery or shunt or mini-shunt placement.
- A shunt or mini-shunt is any device implanted to lower intraocular pressure
through an external route (e.g Ahmed) or internal route (e.g. Glaukos) that
is present in the anterior chamber angle or extends into the anterior
13. Controlled glaucoma with prior shunt or mini-shunt placement for glaucoma
- Note: FECD or pseudophakic/aphakic corneal edema with posterior chamber IOL
that also have undergone filtering surgery (without shunt or mini-shunt) in
which glaucoma is currently considered under control will be eligible
14. Fellow eye visual acuity < 20/200 that is not correctable with EK
Eligibility Criteria for Second Study Eye
1. Study participant has already enrolled one eye
2. The second eye meets all study eye inclusion and exclusion criteria (2.2.2 and 2.2.3)
3. EK surgery in second eye is not planned within 6 weeks of EK on first study eye

Contact Information

Study Contact Sonia Yoo
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