Please select the eligibility criteria that correspond to the clinical trial below.
Title: N/A
Brief Summary: To evaluate the relative efficacy of orthokeratology, primarily by assessment of changes in central corneal thickness, astigmatism, visual acuity, endothelial cell density, and corneal curvature.

To evaluate the relative safety of orthokeratology, primarily by assessment of changes in central corneal thickness, astigmatism, visual acuity, endothelial cell density, induced corneal edema, and epithelial staining.

To assess the duration of any orthokeratology treatment effect.

To study the mechanisms by which refractive error and visual acuity changes occur, in particular the contribution that comes from changes in corneal curvature and shape.

To determine whether there were any predisposing ocular factors that could be used to predict which subjects will experience changes or complications.


Options:
A: Boys must have been between 6 and 12 years of age; girls between 6 and 11 years of age. All children must have had at least 0.5 diopters of myopia in both eyes, near-point esophoria, at least 20/25 acuity in each eye, and 40 seconds of stereopsis and must have been free of ocular disease or systemic disease that may have altered refraction. All subjects were willing to wear bifocal spectacle lenses for 30 months.
B: Myopic volunteers, ages 20 to 35, who had not worn contact lenses were eligible to participate in the study if they were free of ocular disease, were in good physical health, and were not taking systemic medications that could have ocular side effects. In addition, eligibility was limited to persons with corneal curvature between 40.50 and 47.00 D (flatter keratometry reading), corrected visual acuity of 6/6 (20/20) or better in each eye, astigmatism less than 0.75 D, anisometropia less than 1 D, and myopia between 1 and 4 D.
C: Inclusion Criteria:

* 6 to 10 years old
* Myopia: between 0.50 D and 4.00 D in both eyes
* Astigmatism: \<1.50 D; ≤ 1.25 D for with-the-rule astigmatism (axes 180 ± 30); ≤ 0.50 D for astigmatism of other axes in both eyes
* Anisometropia: ≤ 1.50 D
* Symmetrical corneal topography with corneal toricity \<2.00 D in both eyes
* Agree for randomization

Exclusion Criteria:

* Contraindications for orthokeratology wear (e.g. limbus-to-limbus corneal cylinder and dislocated corneal apex)
* Any type of strabismus or amblyopia
* Myopic treatment (e.g. refractive surgery and progressive lens wear for myopic control) before and during the study period
* Rigid contact lenses (including orthokeratology lenses) experience
* Systemic condition which might affect refractive development (for example, Down syndrome, Marfan's syndrome)
* Ocular conditions which might affect the refractive error (for example, cataract, ptosis)
* Poor compliance for lens wear or follow-up
D: Inclusion Criteria:

* all included patients, age from 6 to 15 years, had myopia (spherical equivalent \> -0.5 D) after cycloplegic refraction,
* The astigmatism and anisometropia were less than 2.0 D,
* IOP was less than 21 mmHg.

Exclusion Criteria:

* the presence of related disease such as infection, ulceration, eyelid disease, ocular and auricular disorders,
* individuals with amblyopia or strabismus,
* individuals received any other therapies in the period of study,
* individuals suffering some sort of haemostasis disorder,
* individuals did not follow the treatment (eyedrops and/or stimulation of auricular acupoints) over seven days

Answer: B