I agree with Mimosa et al about the eyes, blue eyes are simply a side effect of other genes (white spotting, colourpoint, dominant white), not a genetic entity in their own right.*
Oriental cats, including Siamese, dominant white, and bicolour, are all, generally speaking, genetically green eyed cats. However the white coat colour (or albinism in the case of colourpoint) prevents pigment from forming in the eye and the colour of the iris without dense pigment is blue. You can (depending on the registry LOL) mate a dominant white (blue eyed) OSH to a black (green eyed) OSH and assuming that the dominant white carries non-white and doesn't carry any colour or markings 'surprises', you will end up with blue eyed white kittens and green eyed black kittens. Similarly (and more commonly done), matings of Siamese x OSH can only ever result in green eyed OSH and blue eyed Siamese, there is no deviation from this at all. Bicolour OSH will have either green eyes, blue eyes, or odd-eyed green/blue, depending upon the distribution of white spotting.
If gold/amber/any other colour eyes were the result of blue eyes x green eyes, then you would get OSH from White x OSH or Siamese x OSH matings with different coloured eyes - but you don't, because it isn't caused by breeding one to the other and OSH have green eyes - so the only possible combinations are green, blue (colourpoint, dominant white, bicolour), or odd-eyed green and blue (bicolour).
*Edit - except of course in the case of the Ojos Azules, but that is a rare dominant gene that isn't found in the general cat population.