If you have sensitive eyes, or are prone to allergic reactions from cosmetics, it is very important to choose a mascara that won't irritate your eyes. Mascara can easily mix with the natural moisture in the eyes, causing them to itch and hurt. To choose the best mascara for you, first try to determine if there are particular ingredients in mascaras that you are sensitive or allergic to, and avoid those products.
If you have an allergy, your only option is to choose hypoallergenic mascara. The package will typically be clearly marked as hypoallergenic; keep in mind that "natural" or "organic" products are not necessarily hypoallergenic. Even if you are not allergic, selecting a hypoallergenic mascara for sensitive eyes is usually a good choice, because it has been thoroughly tested by a dermatologist and will not contain any potential irritants.
If you are concerned about certain ingredients in cosmetics, you might choose organic or natural mascara. Though these may not be hypoallergenic, they may be designed with fewer ingredients or more nature-based ingredients that may not irritate the eyes. It may be necessary to try more than one type of mascara in order to find the best one for you. Hypoallergenic, natural, and organic mascara can be found in many drugstores or online; be sure to carefully read the packaging so you are aware of exactly what you are purchasing.
If a mascara irritates your eyes, immediately stop using it and switch to something else. There should be no need to "get used to" a new product for the eyes. In addition, remember to replace your mascara approximately every three months, and more frequently if you notice an odd smell or if the mascara is made with organic or natural products, which may not hold up as well. Do not pump the mascara wand in and out of the tube, which can introduce bacteria into the mascara, and potentially lead to an eye infection.
In addition to choosing the best mascara for sensitive eyes, it is important to choose a makeup remover for sensitive eyes as well. The makeup remover should be able to thoroughly remove all of the mascara with one or two sweeps of a cotton ball or pre-soaked makeup remover pad. There should be no need for rubbing, pulling, or tugging on the eyes. There are many eye makeup removers designed for those with sensitive eyes, so it is important to choose carefully.