Eye drops with hyaluron
Eye drops with hyaluron are often so-called tear substitutes, i.e. eye drops for the treatment of dry eyes. Hyaluronic acid is a natural fluid reservoir which, for example, binds the fluid in our connective tissue and provides the necessary elasticity of the skin. This function is then also used as an ingredient in eye drops.
Tear substitutes are available without prescription from a doctor in the pharmacy. Tear substitutes are mainly used for dry eyes, but also for eye irritation, eye inflammation or conjunctivitis. They are also used by many contact lens wearers to improve the comfort of wearing lenses.
Eye drops with vitamin A
Eye drops in the form of tear substitutes may contain vitamin A as an additive. Vitamin A is colloquially known as the eye vitamin, as it plays a central role in the visual process. In addition, it improves the tear film, which is why it also helps dry eyes. It is therefore found in some tear substitutes. The eye drops with vitamin A can be bought like all other tear substitutes without a prescription from a doctor in the pharmacy.
Euphrasia eye drops
Euphrasia is a medicinal plant whose medicinal effect is not considered to be proven in Germany. Therefore, Euphrasia is not registered as a herbal medicinal product and is only used as a homeopathic remedy. Euphrasia is said to have antibacterial, pain-relieving and anti-inflammatory effects, especially on the eye, and is therefore also called “eyebright“.
Euphrasia is therefore used particularly frequently in the form of eye drops. Euphrasia eye drops can then be used, for example, in the case of conjunctivitis, which does not run purulent, or swelling of the eyelid (lid oedema). There is also eyebright tea in which, for example, compresses or eye bands can be soaked to treat the eye.
Euphrasia globules or eye ointments are also available. As already mentioned, however, an effect has not been reliably proven. You want to know more about Euphrasia eye drops?
Eye drops are sterile according to the European Pharmacopoeia (Ph. Eur.) and may be sold in Germany only in pharmacies.
Either the eye drops are available in disposable plastic ampoules or in bottles made of special glass (brown glass). The eye drops are not only produced industrially but also mixed directly in the pharmacy according to the prescription of the prescribing ophthalmologist. Eye drops should have a physiological pH value of 7.4 (isohydric) and an osmotic pressure corresponding to that of the corneal epithelium (isotonic) so that the eye is not unnecessarily irritated.
However, most active ingredients are not chemically stable enough under these pH conditions. For this reason, the pH value of the eye drops is adjusted with lyes or acids in such a way that an optimal stability of the active ingredient is achieved, but the pH value is still in the physiologically compatible (euhydric) range (approx. pH 7.3 to 9.7).
The pH value is adjusted to the physiological pH value after the drop is applied to the eye by the buffering effect of the tear fluid. Since the buffer capacity of the protein/phosphate and bicarbonate buffers in the tear fluid is very small, eye drops must not have a buffer capacity themselves. Isohydric eye drops can be equipped with a buffer.