Magnifiers help the human eye to see objects in detail from close by. The lenses in the Trichoscope bend light rays to recreate an image that is larger than the real-life size of the magnified object. This way, a human eye is able to identify for miniscule insects. Furthermore, the magnifier can aid in identifying the state in which small plant parts (e.g. trichomes) are in.
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The epidermal outgrowths on plants are called trichomes. Several types of trichomes can be distinguished. Some of the most common types are: hair, scales or glandular trichomes. Plants use trichomes for various purposes, the most sophisticated being to deter herbivore attacks. This is done via physical means (cacti) or via chemical means (poison ivy).