Strabismus that can have both visual and cosmetic affects. The

eyes do not work together effectively when focusing (fixing) on an object, particularly when an object is moving (‘tracking an object’).  The pupils may appear to point in towards the nose or outwards to the sides


All the above features are discussed on the following pages.  Although discussed separately these features can interact with one another.  For instance a reduced ability to see detail is made worse by nystagmus which prevents the eyes from fixing and focusing on one particular point

Cross sectional diagram showing the major structures of the human eye.  The visual impairment of Hermansky-Pudlak Syndrome.

Visual Impairment of Hermansky-Syndrome


The visual impairment of HPS is very similar to that of OculoCutaneous Albinism (OCA).  It is caused by a lack of a pigment (Melanin) during the development of the foetus in the womb. The lack of melanin prevents some parts of the eyes from developing and maturing during this critical period. The retinas and nervous system of the eyes (the optic nerves or pathways) are particularly affected.

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Cross sectional diagram showing the major structures of the human eye.  The visual impairment of Hermansky-Pudlak Syndrome.

Features of the Visual impairment of Hermansky-Pudlak Syndrome