for people ages 65 years and up (full criteria)
healthy people welcome
at Sacramento, California and other locations
study started
estimated completion



The objective of the PAS-01 study is to assess the safety of the intraocular as measured by the cumulative incidence of patients who within 5 years after implantation experience persistent vision-impairing corneal edema (corneal edema leading to persistent loss of best corrected distance visual acuity >2 lines from pre-surgery baseline level). The study will test the null hypothesis that the percentage of patients who experience persistent vision-impairing corneal edema is >17% against the alternative that the percentage is <17%. The null hypothesis will be rejected if the upper bound of the two-sided 95% confidence integral for the observed percentage is <17%.

Official Title

Post-approval Study of VisionCare's Implantable Miniature Telescope (by Dr. Isaac Lipshitz) in Patients With Bilateral Severe to Profound Central Vision Impairment Assoc. With End-stage Age-related Macular Degeneration


ECD sub-study. At investigative sites participating in the ECD Sub-Group study, corneal endothelial cell density will be measured by non-contact specular microscopy in a subgroup of 150 patients enrolled in the IMT-PAS-01 in the eye schedule for and implanted with the intraocular telescope at study entry, 3 months, 12, months, 24 months, 36 months, 48 months and 60 months.


AMD Implantable Miniature Telescope


You can join if…

Open to people ages 65 years and up

  • stable severe (BVDCA of 10/160 or poorer) to profound (BCDVA of 20/800 or better) vision impairment caused by bilateral central scotomas associated with end-stage age-related macular degeneration.
  • 65 years of age or older
  • retinal findings of geographic atrophy or disciform scar with foveal involvement
  • visually significant cataract
  • agree to undergo pre- and post-surgery training and assessment
  • achieve at least a 5-letter improvement with external telescope
  • have adequate peripheral vision in the eye not scheduled for surgery

You CAN'T join if...

  • Stargardt's macular dystrophy
  • Anterior chamber depth < 3.0mm
  • Presence of corneal guttate
  • Do not meet minimum age and endothelial cell density requirements
  • evidence of CNV or treatment of CNV within the past 6 months
  • cognitive impairment that would interfere with ability to understand and complete Acceptance of Risk and Informed Decision Agreement or prevent proper training/rehabilitation
  • previous intraocular or cornea surgery of any kind in operative eye, including any type of surgery for either refractive or therapeutic purposes or who have prior or expected ophthalmic related surgery within 30 days preceding intraocular telescope surgery
  • history of steroid-responsive rise in intraocular pressure, uncontrolled glaucoma, or preoperative IOP >22 mm Hg while on maximum medication
  • known sensitivity to post-operative medications
  • history of eye rubbing or an ocular condition that predisposes eye rubbing
  • myopia >6.0 D
  • hyperopia >4.0D
  • axial length <21mm
  • narrow angle, i.e., <Schaffer grade 2
  • cornea stromal or endothelian dystrophies, including guttate
  • inflammatory ocular disease
  • zonular weakness/instability of crystalline lens, or pseudoexfoliation
  • diabetic retinopathy
  • untreated retinal tears
  • retinal vascular disease
  • optic nerve disease
  • history of retinal detachment
  • intraocular tumor
  • retinitis pigmentosa


  • University of California - Davis
    Sacramento California 95817 United States
  • Retina-Vitreous Associates
    Beverly Hills California 90211 United States


accepting new patients
Start Date
Completion Date
VisionCare, Inc.
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