Two drops (0.1 mL) of 0.5% ketorolac tromethamine ophthalmic solution, instilled into the eyes of patients 12 hours and 1 hour prior to cataract extraction achieved measurable levels in 8 of 9 patients' eyes (mean ketorolac concentration 95 ng/mL aqueous humor, range 40 to 170 ng/mL).
Restoring the pH of the scalp may help prevent hair loss from dandruff, bacteria or fungus. Every liquid substance on Earth has a pH, or an acid-base, measurement. Very few substances are neutral; most are either acidic, such as vinegar, or basic, such as bleach.
Other substances, such as hydroxide ions, raise the pH of a solution. Those are called bases. .....There are many different acids and bases that affect pH, but for clarity sake it will be easiest to think only in terms of hydrogen ions (H+) and hydroxide ions (OH-). When water has more free hydrogen ions floating around than hydroxide ions, it is acidic (pH less than 7).