There study had 2 objectives:

to assess the safety and tolerability of the AAV.REP1 vector
to observe the therapeutic benefit, or slowing of the retinal degeneration, of the gene therapy during the study and at a 24-month post-treatment time pointDespite retinal detachment caused by the injection, the study observed initial improved rod and cone function, warranting further study. In 2016, researchers were optimistic that the positive results of 32 choroideremia patients treated over four and a half years with gene therapy in four countries could be long-lasting. Preimplantation genetic diagnosis
For women who carry a mutation in the CHM gene, preimplantation genetic diagnosis can be used during the in-vitro fertilization process to select unaffected embryos to implant. This process call be applied to any monogenic disease. Other potential therapies
While choroideremia is an ideal candidate for gene therapy there are other potential therapies that could restore vision after it has been lost later in life. Foremost of these is stem cell therapy. A clinical trial published in 2014 found that a subretinal injection of human embryonic stem cells in patients with age-related macular degeneration and Stargardt disease was safe and improved vision in most patients. Out of 18 patients, vision improved in 10, improved or remained the same in 7, and decreased in 1 patient, while no improvement was seen in the untreated eyes. The study found "no evidence of adverse proliferation, rejection, or serious ocular or systemic safety issues related to the transplanted tissue."
The combination drug acetylsalicylic acid/dipyridamole (trade names Aggrenox, Asasantin) is a drug combination of:
Acetylsalicylic acid (Aspirin) - An extremely common NSAID that has anticoagulant effects
Dipyridamole, a drug that inhibits platelet activation when given chronically and causes vasodilation when given at high doses over short time.The combination acts as an extended release formulation and is primarily used for platelet inhibition in patients suffering, or at risk from, acute coronary events and stroke. Its use has been shown to be better than the use of either dipyridamole or aspirin alone. == References ==