Gass modified a staging classification used to describe formation of a macular hole. The author is from the Bascom Palmer Eye Institute in Miami, Florida.
Features
Stage
impending hole (yellow spot); early serous detachment of the foveolar retina
1A
impending or occult hole (yellow ring or halo); with a small ring there is serous detachment of the foveolar retina; with a larger ring there may be an occult foveolar hole
1B
small hole or tear in the contracted prefoveolar vitreous bridging the round retinal hole, with no loss of the foveolar retina
2
larger macular hole with or without a pseudo-operculum; posterior vitreous not detached
3
full thickness macular hole with posterior vitreous detachment from the optic disc and macula, with or without a pseudo-operculum
4
where:
• Retinal xanthophyll is the probable source of the yellow color seen in Stage 1.
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