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 Abnormal arrangement of the eye lens.

 Retinal dysplasia.

 Abnormal circulation of intraocular liquid.

 Defects of the ciliary body, such as small cysts in the junction between the sclera and cornea.

 Cysts of the iris and ciliary body sometimes extending to the peripheral part of the retina.

 Microphthalmia or megalophthalmia (abnormally small or abnormally large eye or eyes).

 Abnormally large eyes.

The majority of the eye anomalies are connected with the forward segment of the eye, and some of them can occur independently, although there are also exceptions—such as the retinal displasia. Heterozygotes for the Silver gene are less affected than homozygotes. The vision of horses with cysts is usually normal. Unlike in normal horses with healthy eyes, the sclera of silver horses is sometimes pink, but not pigmented. Not all horses with MCOA have notable problems with their vision, but there are, of course, exceptions. For example, when cysts of a ciliary body are torn due to an impact, it can lead to the detachment of retina.