X-Linked Retinitis Pigmentosa (RPGR) Natural History Study

Clinical Evaluation of Individuals with X-linked Retinitis Pigmentosa (XLRP) caused by RPGR ORF15 Mutations 

The purpose of this study is to learn more about a condition called XLRP. The study investigators want to find out how different changes in the XLRP gene affect vision testing, and what tests are more helpful for tracking changes in a person's eyes and vision. 

Eligibility Criteria: 

  • Age: 6 years and older 
  • Male 
  • Must have a clinical diagnosis of XLRP 
  • Must have a documented mutation within the ORF15 exon of the RPGR gene 
  • Good general health 

The study will occur at the Casey Eye Institute in Portland, OR. You will have 6 visits over the course of 3 years. 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 or have a patient that you believe would be a good candidate, please call the study coordinator at 503-494-0020 or email 

Principal Investigator: 

Paul Yang, M.D., Ph.D.
Casey Eye Institute
3375 SW Terwilliger Blvd. Portland, OR 97239
eIRB#: 17410 

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