Several conditions affecting the eyes can cause<unk>  to occur. The underlying condition must be identified and treated to resolve the symptoms. Peripheral (posterior) vitreous detachment Peripheral (posterior) vitreous detachment occurs when the gel around the eye separates from the retina. This can naturally occur with age. However, if it occurs too rapidly, it can cause<unk>  which manifests in flashes and floaters in the vision. Typically, the flashes and floaters go away in a few months. Retinal detachment The retina lines the inside of the eye. It is light-sensitive and communicates visual messages to the brain. If the retina detaches, it moves and shifts from its normal position. This can cause<unk> , but can also cause permanent vision loss. Medical attention is needed to prevent vision loss. Procedures may include laser treatment, freezing, or surgery. Age-related macular degeneration Age-related macular degeneration (AMD) is a common eye condition among people aged 50 and older. The macula is a part of the eye that helps you see sharply straight ahead. With AMD, the macula slowly deteriorates which can cause<unk> . Ocular (retinal) migraine / Migraine aura Migraines are a type of recurring headache. Migraines typically cause severe pain in the head, but can also cause visual changes known as auras. Migraines can also cause visual snow. Optic neuritis Optic neuritis is an inflammation that damages the optic nerve. It’s linked to multiple sclerosis (MS). Along with flickering or flashing with eye movement, symptoms include pain, loss of colour perception, and vision loss. Occipital lobe infarction (stroke) or ischemia The occipital lobe is one of four lobes in the brain. It controls the ability to see things. Impaired blood flow to the cells of the occipital lobe (ischemia, for example as caused by a TIA or Vertebrobasilar insufficiency) will lead to temporary visual problems; if the poor blood flow is sustained it will lead to cell death (infarction, for example as caused by a stroke) which may cause persistent visual problems. The main symptoms associated with an occipital lobe infarction involve changes to vision such as: * blurry vision * blindness, which may affect part of vision only * hallucinations, such as flashing lights<unk> : usually only in the context of blindness Sensory deprivation (Ophthalmopathic hallucinations) Sensory deprivation or ophthalmopathic hallucination are hallucinations that appear in the field of vision.
Photopsia
Palinopsia
Pelopsia
Micropsia
Dysmorphopsia
Cyanopsia
Akinetopsia
Macropsia