Effectiveness of Orthokeratology in Decreasing Myopic Progression in a Young Adult Population Enrolled in a Professional Optometric Curriculum
| Status: | Recruiting |
|---|---|
| Healthy: | No |
| Age Range: | 20 - 40 |
| Updated: | 4/21/2016 |
| Start Date: | November 2013 |
| Contact: | Yi Pang, O.D. PhD |
| Email: | ypang@ico.edu |
| Phone: | 312-949-7287 |
The high prevalence of myopia - especially in Asian countries - is well documented, as are
the sight-threatening complications of high or degenerative myopia. Retinal detachment,
glaucoma, vitreal degeneration and focal retinal changes occur secondary to the progressive
axial elongation of the eye with age. Specialty rigid lenses have long been shown to lessen
this progression in the pediatric population; orthokeratology (ortho-k) lenses are worn at
night and change the corneal topography to correct low to moderate amounts of myopia. This
same axial elongation has also been shown to occur in young adults with high near demands,
however to our knowledge, there are no studies examining the effect of ortho-k lenses in
this population. Our project seeks to investigate the efficacy of ortho-k in slowing axial
elongation and myopic progression in subjects between the ages of 21-30. Results will help
elucidate what role these specialty lenses may have in the management of the myopic patient
throughout their development, as well as what potential they have in prevention of
associated degenerative changes.
the sight-threatening complications of high or degenerative myopia. Retinal detachment,
glaucoma, vitreal degeneration and focal retinal changes occur secondary to the progressive
axial elongation of the eye with age. Specialty rigid lenses have long been shown to lessen
this progression in the pediatric population; orthokeratology (ortho-k) lenses are worn at
night and change the corneal topography to correct low to moderate amounts of myopia. This
same axial elongation has also been shown to occur in young adults with high near demands,
however to our knowledge, there are no studies examining the effect of ortho-k lenses in
this population. Our project seeks to investigate the efficacy of ortho-k in slowing axial
elongation and myopic progression in subjects between the ages of 21-30. Results will help
elucidate what role these specialty lenses may have in the management of the myopic patient
throughout their development, as well as what potential they have in prevention of
associated degenerative changes.
Inclusion Criteria:
- The subject must be in the incoming first year optometry class, with a myopic
prescription between -0.50D and -5.00D in at least one eye with refractive
astigmatism <1.50D. Visual acuity must be at least logMAR 0.10 (Snellen 20/25) or
better at baseline examination in both eyes. Ocular examination must not reveal any
strabismus, ocular pathology or contraindications for orthokeratology lens wear.
Subjects must be in good general health with no systemic conditions that might impact
their ocular health or refractive error. They must be willing to sleep a minimum of
six hours per night. Finally, subjects must be willing and able to present to clinic
for all necessary follow-up care.
Exclusion Criteria:
- Prescription falls outside the refractive guidelines, have a history of any type of
trauma or ocular surgery, have a history of prior experience with myopia control
treatment, are amblyopic or if they are current gas permeable lens wearers. They will
be discontinued from the study if they are non-compliant with the treatment protocol
or do not achieve a desirable subjective result,
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