In the visual system, images captured by the eye are translated into electric signals that are transmitted to the brain where they are interpreted. As such, in order to overcome<unk> , two main components of the visual system can be addressed: image capturing by the optical system of the eye and image processing in the brain. Image capturing in the eye Solutions for<unk>  have advanced significantly in recent years due to widened availability of optometry care and over-the-counter vision correction options. Corrective lenses Corrective lenses provide vision correction over a range as high as +4.0 diopters. People with<unk>  require a convex lens for reading glasses; specialized preparations of convex lenses usually require the services of an optometrist. Contact lenses can also be used to correct the focusing loss that comes along with<unk> . Multifocal contact lenses can be used to correct vision for both the near and the far. Some people choose contact lenses to correct one eye for near and one eye for far with a method called monovision. Surgery Refractive surgery has been done to create multifocal corneas. PresbyLASIK, a type of multifocal corneal ablation LASIK procedure may be used to correct<unk> . Results are, however, more variable and some people have a decrease in visual acuity. Concerns with refractive surgeries for<unk>  include people's eyes changing with time also. Other side effects of multifocal corneal ablation include postoperative glare, halos, ghost images, and monocular diplopia. Image processing in the brain A number of studies have claimed improvements in near visual acuity by the use of training protocols based on perceptual learning and requiring the detection of briefly presented low-contrast Gabor stimuli; study participants suffering from<unk>  were enabled to read smaller font sizes and to increase their reading speed. Eye drops Pilocarpine, eye drops that constrict the pupil, has been approved by the FDA for<unk> . Research on other drugs is in progress. Eye drops intended to restore lens elasticity are also being investigated.
Presbyopia
Quadrantanopia
Heterotopia 
Pseudomyopia
Nyctalopia
Cerebral polyopia
Entomopia
Ocular dysmetria