Some studies support the hypothesis, while other studies do not. While an association is present, it is not clearly causal.Nearsightedness is also more common in children with diabetes, childhood arthritis, uveitis, and systemic lupus erythematosus. Mechanism
Because myopia is a refractive error, the physical cause of myopia is comparable to any optical system that is out of focus. Borish and Duke-Elder classified myopia by these physical causes:
Axial myopia is attributed to an increase in the eyes axial length 
Refractive myopia is attributed to the condition of the refractive elements of the eye. Borish further subclassified refractive myopia:Curvature myopia is attributed to excessive, or increased, curvature of one or more of the refractive surfaces of the eye, especially the cornea. In those with Cohen syndrome, myopia appears to result from high corneal and lenticular power. Index myopia is attributed to variation in the index of refraction of one or more of the ocular media.As with any optical system experiencing a defocus aberration, the effect can be exaggerated or masked by changing the aperture size. In the case of the eye, a large pupil emphasizes refractive error and a small pupil masks it. This phenomenon can cause a condition in which an individual has a greater difficulty seeing in low-illumination areas, even though there are no symptoms in bright light, such as daylight.Under rare conditions, edema of the ciliary body can cause an anterior displacement of the lens, inducing a myopia shift in refractive error.
These guidelines restrict use of vancomycin to these indications:
Treatment of serious infections caused by susceptible organisms resistant to penicillins (methicillin-resistant S. aureus (MRSA) and multidrug-resistant S. epidermidis (MRSE)) or in individuals with serious allergy to penicillins
Treatment of pseudomembranous colitis caused by C. difficile; in particular, in cases of relapse or where the infection is unresponsive to metronidazole treatment (for this indication, vancomycin is given orally, rather than by its typical intravenous route)
For treatment of infections caused by Gram-positive microorganisms in patients with serious allergies to beta-lactam antimicrobials. Antibacterial prophylaxis for endocarditis following certain procedures in penicillin-hypersensitive individuals at high risk
Surgical prophylaxis for major procedures involving implantation of prostheses in institutions with a high rate of MRSA or MRSE
Early in treatment as an empiric antibiotic for possible MRSA infection while waiting for culture identification of the infecting organism
Halting the progression of primary sclerosing cholangitis and preventing symptoms; vancomycin does not cure the patient and success is limited
Treatment of endophthalmitis by intravitreal injection for gram-positive bacteria coverage. It use to prevent the condition, however, is not recommended due to the risk of side effects. Spectrum of susceptibility
Vancomycin is considered a last resort medication for the treatment of sepsis and lower respiratory tract, skin, and bone infections caused by Gram-positive bacteria.