✦Description
A recurring threshold image: the spinning onset mandala or a central point dilates open like a camera iris, a flower unfurling, a sphincter or a mechanical shutter, revealing depth and a space beyond. Where the Chrysanthemum can act as a closed door, the aperture is the moment it irises open and admits the traveler. Frequently reported as a bright central point or 'central light' that widens into a tunnel-mouth or portal, or as a magic-eye-like resolving of flat texture into an opening one is pulled through. Distinct from the tunnel-flight that often follows: the aperture is the dilation event itself, the opening of the way.
✦What the sources say
'The Chrysanthemum... turns into a doorway, either welcoming or blocking access to breakthrough Hyperspace'; 'Central Light' described as an intelligent, sun-like source 'ontologically central to all existence.'
'Magic Eye' stage: flat texture resolves into depth so that 'the surfaces of the world-sheet' open into 3D forms and passageways.
22% of accounts (8/36) reported breaking through a 'veil or membrane' that parts to admit them into the breakthrough space.
Questions
What is The Aperture / Iris Opening?
A recurring threshold image: the spinning onset mandala or a central point dilates open like a camera iris, a flower unfurling, a sphincter or a mechanical shutter, revealing depth and a space beyond. Where the Chrysanthemum can act as a closed door, the aperture is the moment it irises open and admits the traveler. Frequently reported as a bright central point or 'central light' that widens into
Is there research on The Aperture / Iris Opening?
Consistent with Klüver's 'tunnel/funnel' form constant and the retinocortical map, in which concentric/radial cortical activity is perceived as a central opening or funnel expanding outward from the visual-field center.