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Dry eye occurs when either the eye does not produce enough tears or when the tears evaporate too quickly. [2] This can be caused by age, contact lens use, meibomian gland dysfunction , [ 7 ] pregnancy , Sjögren syndrome , vitamin A deficiency , omega-3 fatty acid deficiency, LASIK surgery , and certain medications such as antihistamines , some ...
The skin is similar to areas elsewhere, but is relatively thin [1] and has more pigment cells. In diseased persons, these may wander and cause a discoloration of the lids. It contains sweat glands and hairs, the latter becoming eyelashes as the border of the eyelid is met. [2]
Halaman:Peraturan Menteri Pendidikan dan Kebudayaan Nomor 50 Tahun 2015 tentang Pedoman Umum Ejaan Bahasa Indonesia.pdf/35 Metadata This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
(H52.1) Myopia (Nearsightedness) — distant objects appear blurred (H52.2) Astigmatism — the cornea or the lens of the eye is not perfectly spherical, resulting in different focal points in different planes (H52.3) Anisometropia — the lenses of the two eyes have different focal lengths
Astigmatism may be corrected with eyeglasses, contact lenses, or refractive surgery. [1] Glasses are the simplest and safest, although contact lenses can provide a wider field of vision . Refractive surgery can eliminate the need to wear corrective lenses altogether by permanently changing the shape of the eye but, like all elective surgery ...
Langenscheidt dictionaries in various languages A multi-volume Latin dictionary by Egidio Forcellini Dictionary definition entries. A dictionary is a listing of lexemes from the lexicon of one or more specific languages, often arranged alphabetically (or by consonantal root for Semitic languages or radical and stroke for logographic languages), which may include information on definitions ...
The macula (/ˈmakjʊlə/) [1] or macula lutea is an oval-shaped pigmented area in the center of the retina of the human eye and in other animals. The macula in humans has a diameter of around 5.5 mm (0.22 in) and is subdivided into the umbo, foveola, foveal avascular zone, fovea, parafovea, and perifovea areas.
Segment 1 is the afferent limb, which includes the retina and optic nerve. Segments 5 and 7 form the efferent limb. Left consensual light reflex involves neural segments 2, 4, and 7. Segment 2 is the afferent limb. Segments 4 and 7 form the efferent limb. Right direct light reflex involves neural segments 2, 6, and 8. Segment 2 is the afferent ...