These studies demonstrated some derivatives of marijuana lowered intraocular pressure when administered orally, intravenously, or by smoking, but not when topically applied to the eye. In 2003, the American Academy of Ophthalmology released a position statement stating that cannabis was not more effective than prescription medications. Furthermore, no scientific evidence has been found that demonstrates increased benefits and/or diminished risks of cannabis use to treat glaucoma compared with the wide variety of pharmaceutical agents now available.In 2010 the American Glaucoma Society published a position paper discrediting the use of cannabis as a legitimate treatment for elevated intraocular pressure, for reasons including short duration of action and side effects that limit many activities of daily living. Health disparities in glaucoma
In diagnosis
A study conducted in UK showed that people living in an area of high deprivation were likely to be diagnosed in the later stage of the disease. It also showed that there were lack of professional ophthalmic services in the area of high deprivation. In treatment
A study in 2017 shows that there is a huge difference in the volume of glaucoma testing depending on the type of insurance in the US. Researchers reviewed 21,766 persons age ≥ 40 years old with newly diagnosed open-angle glaucoma (OAG) and found that Medicaid recipients had substantially lower volume of glaucoma testing performed compared to patients with commercial health insurance.
This is enforced by municipal inspectors and was inspired by the death of 7-year-old Nicole Garofalo in 2005 due to snow blocking a home heating vent. Other jurisdictions may have no requirement or only mandate detectors for new construction or at time of sale. Despite similar deaths in vehicles with clogged exhaust pipes (for example in the Northeastern United States blizzard of 1978 and February 2013 noreaster) and the commercial availability of the equipment, there is no legal requirement for automotive CO detectors. World Health Organization recommendations
The following guideline values (ppm values rounded) and periods of time-weighted average exposures have been determined in such a way that the carboxyhaemoglobin (COHb) level of 2.5% is not exceeded, even when a normal subject engages in light or moderate exercise:

100 mg/m3 (87 ppm) for 15 min
60 mg/m3 (52 ppm) for 30 min
30 mg/m3 (26 ppm) for 1 h
10 mg/m3 (9 ppm) for 8 h
7 mg/m3 (6 ppm) for 24 h (for indoor air quality, so as not to exceed 2% COHb for chronic exposure)

Diagnosis
As many symptoms of carbon monoxide poisoning also occur with many other types of poisonings and infections (such as the flu), the diagnosis is often difficult. A history of potential carbon monoxide exposure, such as being exposed to a residential fire, may suggest poisoning, but the diagnosis is confirmed by measuring the levels of carbon monoxide in the blood.