Floaters: This condition is characterized by the presence of small, dark spots that float in the visual field, often more noticeable when looking at bright lights or plain backgrounds. The symptoms can be accompanied by blurry vision, especially if the floaters are large or numerous. The presence of floaters is usually due to age-related changes in the vitreous humor, the gel-like substance inside the eyeball.

Vitreous Detachment: This condition occurs when the vitreous gel separates from the retina, which can cause floaters and blurry vision. It is more common in older adults and those who are nearsighted.
Retinal Tear or Detachment: These are serious conditions that can cause sudden onset of floaters and blurry vision. They require immediate medical attention to prevent permanent vision loss.
Migraine: Some types of migraines can cause visual disturbances, including blurry vision and seeing spots or flashes of light.

Retinal Vein Occlusion: This is a condition where the vein that carries blood away from the retina becomes blocked, leading to sudden vision loss. It is a medical emergency that requires prompt treatment.
Diabetic Retinopathy: A complication of diabetes that can cause blurry vision, floaters, and vision loss if left untreated.
Optic Neuritis: Inflammation of the optic nerve that can cause pain, blurry vision, and loss of vision. It can be associated with multiple sclerosis.

Ocular Melanoma: A type of cancer that can cause floaters and blurry vision if it affects the vitreous or retina.
Posterior Vitreous Detachment with Hemorrhage: Although posterior vitreous detachment is common, when it is accompanied by hemorrhage, it can lead to significant visual disturbances, including floaters and blurry vision.
Sympathetic Ophthalmia: A rare, inflammatory condition that can occur after eye surgery or trauma, leading to vision loss and other symptoms in the unaffected eye.