One of the effects of decreased blood pressure is the expansion of our blood vessels (which include arteries, veins, and capillaries). In the case of our eyes, the ocular capillaries become dilated and take in more blood, and the expanded blood vessels on the surface of the sclera make eyes appear redder. Tetrahydrocannabinol (by reducing blood pressure), also reduces the intraocular pressure of the eye. Increased intraocular pressure is the key factor for all glaucoma diseases, and lowering the IOP (or intraocular pressure), is the only way for us to battle glaucoma, which when left untreated can result in a severe loss of vision, and ultimately blindness.
One of the first studies conducted on this correlation showed that high THC strains can lower the IOP in the range of 25% to 30%. The main issue with treating glaucoma with marijuana is that the IOP needs to be constantly lowered in order for the eye to function properly (edibles are best for this because of their extended duration), while the second issue is that the users who constantly consume large quantities of THC can experience some side effects in their everyday life. If you and the people around you regularly consume cannabis, you probably already noticed that the same strain has different effects on different people. These differing effects happen due to a number of key factors which include genetics, sex, overall health and frequency of consumption (increased frequency causes cannabinoid tolerance). You also might have noticed the same thing about the eyes. Some people get really intense bloodshot eyes, while on others the difference is barely visible, or even non-existent. The redness is completely dependant on the person’s blood pressure.
For instance, if you have high blood pressure, THC won’t be able to decrease it enough for your eyes to become really super-red. I myself actually have a completely opposite problem, as my blood pressure is rather low, so when I consume a potent THC strain, I literally look like the Terminator. Besides the redness, when the session includes several joints/blunts I can also experience weakness in the legs and symptoms like feeling faint. This, of course, isn’t only a result of a low blood pressure but is brought about from a complex equation of factors I previously mentioned like age, sex, health, genetics etc. Allergies can also play a factor in the overall “bloodshot volume”, as there are many people who are very sensitive to smoke in general. Another possibility for increased redness is cannabis allergy, but for users who have this unfortunate issue, red eyes are the least of their concerns. The most common way to alleviate your red eyes is, of course, through various over-the-counter eye drops that are designed for eye allergies, redness and itchiness. Pretty much all variations contain tetryzoline (also known as tetrahydrozoline), which is an alpha agonist that causes dilated blood vessels to constrict. As previously mentioned, THC makes our blood vessels and capillaries to dilate (directly causing the redness), so the eye drops reverse this effect and return our eyes to a normal state. These types of medications are generally quite safe for use, but I strongly recommend that you always carefully read the manual that comes with the drops. There are a few alternatives to eye drops which can also constrict the blood vessels in our body, such as caffeine, chocolate, liquorice, and sodium. A common misconception is that increased hydration can be used for reducing the redness of the eyes, which is unfortunately entirely false. People frequently perceive the redness as a sign of dehydration, because they associate it with the accompanying sensation of dry mouth. One of the many ways cannabis influences us is by activating the endocannabinoid receptors that are found in our salivary glands. Once excited by cannabinoids from weed, they slow down the fabrication of saliva, which causes us to feel like there’s a desert where our mouth used to be. Greencamp.com is an educational website dedicated to shedding the light on many unexplored sides of medical and recreational cannabis. Aside from informing people of safe cannabis use, Greencamp also provides technology for finding optimal cannabis treatment. We encourage all readers to share their views on our articles and blog posts. We are committed to maintaining a lively but civil forum for discussion, so we ask you to avoid personal attacks, and please keep your comments relevant and respectful. If you encounter a comment that is abusive, click the "X" in the upper right corner of the comment box to report spam or abuse. Glass blower is using his breath to blow out the bowls and to create the shape. The bigger bongs with double bowls are processed in parts. Once the basic shape is blown out, other surface glass decorations can be added. decoration of the water bong mouthpiece or slider holder. Also the holes for a slider and a carb are heated-up and blown out and ice catcher is made. After a while, when the bowls are little cooler, the rest of the material is cut off and the edges are softened and adjusted. The cooling process of each glass piece is also important. The heavier the product is the more time is needed for its cooling. We use special ovens for slower cooling of the freshly made products, which makes the glass more durable.
If the glass is cooled down too fast, it can crack in the future even if it is just resting on the shelf. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. wikiHow marks an article as reader-approved once it receives enough positive feedback. In this case, 84% of readers who voted found the article helpful, earning it our reader-approved status. Do you like saving money by building your own bongs? Have you gotten tired of using cheap plastics and spare parts to make a working bong? If so, you might want to step up by making a glass water bong; the glass results in a sturdier container allowing for bigger and more even hits, and it will perform as well as an expensive, store-bought water pipe.
Why I save my stems (and why you should, too!) Foreverstoned.