Ah, the following quotation is taken from pages 274 & 275 of Ian Baker’s Tibetan Yoga Principles and Practices (as well as the accompanying image of a Yogini demonstrating one particular posture) and I’m borrowing from it to illustrate HOW it is possible for an holistic “energetic recalibration” of one’s Embodied Manifestation eh ? 😉
The word hathayoga first appears in the Guhyasamäja Tantra where it serves as an adjunct practice for facilitating visionary experience. Although the specific method of that initial Hatha Yoga technique remains obscure, its stated optical intention relates it with the recursive visionary practices of Tögal.
As with Indian Hatha Yoga, the somatic practices of Vajrayäna Buddhism use dynamic means to harmonize polarized modes of consciousness through the symbolic medium of the body’s central energetic channel, or madhyanädi. In Dzogchen, body-based yoga evolves into a reorientation of physiological and attentional processes and an awakening of the heart’s posited potential as an organ of recursive perception. By directing attention  to what is commonly overlooked the mind becomes increasingly aware of normally subconscious processes and thereby develops insight, clarity and adaptability, which contribute to an openness of being and expanded experience of human embodiment. Yoga in Vajrayäna and Dzogchen ultimately transcends its cultural context and points towards the awakening of collective human capacities. Forceful Hatha Yoga-like practices ultimately matter less in the optimization of the human condition than the integral consciousness represented by ‘leaping over the skull’. 
As a deeply embodied form of yoga, Tögal recalibrates physiological processes through changing the way they are perceived, leading to creative synergy within all experience. The liberating reorientation of consciousness at the heart of Tögal is expressed concisely in the Tantra of the All-Creative King, one of Dzogchen’s earliest texts : 
“With no need of transformation or purification, pure presence [within the body] is perfected in itself”. Rigdzin Jigme Lingpa reaffirmed this view in the 18th century by stating that, “The pith essence of the Great Perfection is to dwell in the natural radiance of all that occurs, at one with actions, energies, and thoughts and beyond all contrived boundaries of view and meditation; at ease in the naked clarity of the present moment“.
Beyond the tradition of Vajrayäna Buddhism, the 18th-century poet William Blake, who first introduced the influential phrase doors of perception, expressed the essence of the self-transcendent and liberating vision of Tögal in a resonant line in his poem The Mental Traveller. As Blake evocatively wrote: “The Eye altering alters all“. Applying that perceptual meme to the persistent illusion of an ‘I’ and awakening to transpersonal dimensions of consciousness absent of cognitive and emotional strife lies at heart of Tibetan yoga, a process that involves altering (‘making other’) our embodied experience and, in so doing, promoting alternate forms of awareness that transcend perennially limiting perspectives and preoccupations. The fruition of Tibetan yoga, and by extension life itself, is thus the unveiling of the pure ecstatic presence that sees through the eyes of the heart into a world that is forever renewed by our synergetic perceptions and interactions.
The Dzogchen posture of the Soaring Garuda opens subtle energy channels within the body so as to reveal the self-existing, innately pure and expanded consciousness that is inseparable from enlightenment
Oh, now I’d say it’s very likely that most of us are “Householders” and therefore will have to adapt as best as possible to try and capture the “essence” of the Dzogchen teachings because WHO has a “Dark Retreat” room or even sufficient time-off from their Mundane-Employment to go-into-retreat and get a “real taste” of what is being pointed at eh ? ⏰
Thus, in the above example, it’s the directing of your Eyeballs upwards (with some effort at first until it becomes an effortless habit)  that I suggest Induces (or Activates) our inner physiological processes at the heart of such Esoterica eh ? ❤️
 See topmost image illustrating HOW to reverse the direction of your “attention” eh ? It is as though you are directing your attention towards the top of your head and sensing “what is there” 🧐
 i.e. Tögal
 Or, if you are at home, seated in a Meditative Posture, with the Head kept level gently direct the Eyeballs upwards eh ? 👀