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Fundus photography and fundus images are pictures of the retina. The fundus of the eye is just the interior surface of the eye opposite the lens, so it includes the retina as well as the optic disc, macula, fovea, and posterior pole. In my reading, fundus cameras are also referred to as retinal cameras, and vice versa. "Retinal imaging" may be a more general ...


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Tears are very complex fluids. Their job is to lubricate, moisturize, and oxygenate the corneas and inner eyelids, to be antibiotic/antiviral, to break down byproducts, etc. They're continually produced and their composition changes with environmental demands (e.g., they're more acidic at the end of the night, there are more of some types of enzymes). When ...


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Meridian of the eye: Considering the center of the pupil as a pole, imaginary lines are drawn around the eyeball that is intersected at the poles (both anterior and posterior) and are called as the meridians of the eye. The flattest and steepest meridians of the eye are termed as the principal meridians. https://www.news-medical.net/health/Astigmatism-Types-...


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The eye does not move in and out in the sense of the eye socket. The in and out movement is best described in this kids eye health page where it describes a condition called strabismus (emphasis mine). Strabismus is the term used for eyes that are not straight and do not focus on the same object. Eyes can turn in (toward the nose), out (toward the ear), ...


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