EMN changes result in which retinal change?

EMN changes result in which retinal change?

• A. Disrupted pigmentation
• B. Hyperpigmentation of the macula
• C. Increased vascularity
• D. Retinal edema only

Answer: (A)

EMN changes primarily affect the cells that provide retinal pigmentation, so they produce irregular, patchy pigment rather than fluid buildup or new blood vessels. The retinal pigment epithelium normally maintains a uniform melanin distribution; when EMN is involved, that pigment is disrupted, creating mottled or depigmented areas. In horses there isn’t a true macula lutea, so hyperpigmentation of a macular region isn’t a typical finding, and edema or neovascularization aren’t the primary features of EMN-related changes. That’s why disrupted pigmentation best explains the retinal change.

EMN changes primarily affect the cells that provide retinal pigmentation, so they produce irregular, patchy pigment rather than fluid buildup or new blood vessels. The retinal pigment epithelium normally maintains a uniform melanin distribution; when EMN is involved, that pigment is disrupted, creating mottled or depigmented areas. In horses there isn’t a true macula lutea, so hyperpigmentation of a macular region isn’t a typical finding, and edema or neovascularization aren’t the primary features of EMN-related changes. That’s why disrupted pigmentation best explains the retinal change.