An example of one of these devices is a column chromatography bed, meaning that the stationary bed is in a tube. In some situations, chromatography is used as a method of purification. This is referred to as preparative chromatography. Another use of chromatography is analytical chromatography. This method of separation occurs with smaller amounts of material and is used to measure analytes in a mixture.
Flashing lights and floaters may be the initial symptoms of a retinal detachment or of a retinal tear that precedes the detachment itself. Anyone who is beginning to experience these symptoms should see an eye doctor (ophthalmologist) for a retinal exam.
What Is a Detached Retina (Retinal Detachment)? A detached retina occurs when the retina is pulled away from its normal position in the back of the eye. The retina sends visual images to the brain through the optic nerve. When detachment occurs, vision is blurred. A detached retina is a serious problem that can cause blindness unless it is treated.