Natural History of the Progression of X-Linked Retinitis Pigmentosa

Natural History of the Progression of X-Linked Retinitis Pigmentosa (XOLARIS Study)

The purpose of this study is to learn more about a condition called X-linked retinitis pigmentosa (XLRP). The study investigators want to gain a better understanding of disease progression over time in subjects with XLRP. 

Eligibility Criteria: 

  • Age: 16 years and older 
  • Male 
  • Must have a diagnosis of XLRP 
  • Good general health 

The study will occur at the Casey Eye Institute in Portland, OR. You will have 7 visits over the course of 24 months. Each study visit is expected to last about 1-2 days and will involve functional vision tests and dilated eye exams. 

All study procedures will be covered by the study sponsor and travel reimbursement is available. 

If you are interested in learning more about this study please call the study coordinator at 503-494-0020 or email 

A Phase III trial is being planned at a later date and patients from the XOLARIS study may be able to participate if the relevant Phase III inclusion/exclusion criteria are met. 

Principal Investigator: Mark Pennesi, M.D., Ph.D.
Casey Eye Institute
3375 SW Terwilliger Blvd.
Portland, OR 97239 

eIRB#: 17533
IRB Approved: 10/18/2017

Additional information Sponsor: Nightstar 

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