Noise sensitivity may develop as a result of an abnormality in the middle or inner ear. Trauma to the ear may cause noise sensitivity. Noise sensitivity may be present with migraine headaches. Noise sensitivity may occur as a side effect of certain medications. Noise sensitivity may occur as a result of an ear infection. People with misophonia find it impossible to tolerate certain sounds.
Equal division lenses, segmented bifocals and blended lenses â also called seamless or invisible bifocals â are three main types of bifocals. Equal division bifocal glasses feature lenses cut in two distinct halves, with the magnification part on the lower half and the long-distance lens on the upper half. The initial version of the equal division lenses, called the executive cut, had a visible horizontal line directly across the lens.
Bifocal contact lenses are for people suffering from presbyopia or astigmatism. Each bifocal lens must be customized to each patientâs needs. A doctorâs method of fitting can either be monovision or multifocal, and they can choose from silicone hydrogel, soft, or GP lens materials. Use a toric single vision soft contact lens on the dominant eye, and a multifocal on the non-dominant eye. 2  If only the non-dominant eye exhibits blurriness, try using a multifocal soft lens in both eyes, or try a toric, single-vision lens in the non-dominant eye.