[The renin-angiotensin system (RAS) is one of the most important mechanisms regarding the pathomechanism and treatment of hyprtension. The most of the elements of the RAS are found in the nervous system too. The effect of angiotensin converting enzyme inhibitors and angiotensin receptor blockers (ARBs) is based on the inhibition of the RAS. ARBs might have a special role in the central nervous system because they do not decrease the production of angiotensin but inhibit its harmful effects mediated through the AT1 receptor while allowing the stimulation of AT2 receptors with resulting pleiotrophic actions. Hypertension is the most important risk factor for stroke and has a negative effect on cognitive functions. Antihypertensive treatment has an effect on the nervous system; in addition to the consequences of the reduced blood pressure, ARBs might provide additional advantages in stroke and dementia prevention.]

[The improvement of contact lens materials and types have made it possible to use contact lenses for visual rehabilitation besides optical and cosmetic use, The high oxygen permeability of contact lenses have extended the age limits for contact lens wear and encouraged clinicians to use them for therapeutic purposes, especially for pain relief and aiding cornea epithelialisation. Contact lenses can be worn safely for years if rules of hygiene are followed. Their use is most frequently abandoned because of contact lens related dry eye. Despite the high oxigen permeability, their prolonged wear increases the risk of inflammation.]