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The venous hypertension also contributes to the head swelling seen in photos of astronauts and the nasal and sinus congestion along with headache noted by many. There is also subsequent venous hypertension in the venous system of the eye which may contribute to the findings noted on ophthalmic exam and contributing to the visual disturbances noted.
Cotton wool spots are opaque fluffy white patches on the retina of the eye that are considered an abnormal finding during a funduscopic exam (also called an ophthalmoscopic exam). [1] Cotton wool spots are typically a sign of another disease state, most common of which is diabetic retinopathy. [2] The irregularly shaped white patches are a ...
Idiopathic intracranial hypertension ( IIH ), previously known as pseudotumor cerebri and benign intracranial hypertension, is a condition characterized by increased intracranial pressure (pressure around the brain) without a detectable cause. [2] The main symptoms are headache, vision problems, ringing in the ears, and shoulder pain.
Strongly modulated blood flow pulse in central and branch arteries can result from hypertension. Microangiography by laser Doppler imaging may reveal altered hemodynamics non-invasively. Mild signs of hypertensive retinopathy can be seen quite frequently in normal people (3–14% of adult individuals aged ≥40 years), even without hypertension.
A veterinary expert explains why our canine companions get them in the first place.
Asteroid hyalosis is a degenerative condition of the eye involving small white opacities in the vitreous humor. [1] It is known to occur in humans, dogs, cats, horses, and chinchillas. [2] Clinically, these opacities are quite refractile, giving the appearance of stars shining in the night sky—except that ocular asteroids are often quite mobile.
Ocular hypertension. Ocular hypertension is the presence of elevated fluid pressure inside the eye ( intraocular pressure ), usually with no optic nerve damage or visual field loss. [1] [2] For most individuals, the normal range of intraocular pressure is between 10 mmHg and 21 mmHg. [3] [4] Elevated intraocular pressure is an important risk ...
Canine glaucoma refers to a group of diseases in dogs that affect the optic nerve and involve a loss of retinal ganglion cells in a characteristic pattern. An intraocular pressure greater than 22 mmHg (2.9 kPa) is a significant risk factor for the development of glaucoma. Untreated glaucoma in dogs leads to permanent damage of the optic nerve ...
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