Nutrients and Metabolic Secretions Transfer in Cornea
This work demonstrates the need for updated review of the mechanism of mass transport in the human cornea, to understand the deterioration of visual acuity and plan your recovery. It is the conclusion of a work for ten years for recovery of presbyopia of the first author, through exercise the extra-ocular and ciliary muscles. It is shown that intraocular pressure varies according to the direction of the visual axis and that this variation is part of the mechanism of forced convection for the transport of nutrients and drainage of secretions metabolic in cornea. In both eyes, seven pressure measurements are proposed at intervals of one hour, with the non-contact tonometer: The first measurement in the initial condition; The second measurement after relaxation of the eyes; The following measurement after an activity with the attachment point near of the two eyes; The last four are proposed out after two activities, in the limit of the direction of the right border and, also, in the limit of the direction of the left border of the field of binocular vision, considering the two alternatives near and far from the eyes. The oblique muscles contraction causes a reduction in the anterior chamber volume and, consequently, the intraocular pressure increases, however, when the oblique muscles relax the opposite occurs. It is considered that, after an hour, the intraocular pressure reaches dynamic equilibrium. To measure the pressure, the equilibrium condition of the anterior chamber volume is changed, the system undergoes a new transient dynamic. There should be no change in intraocular pressure equilibrium during one day, unless because of an external factor. To collect the data, it is proposed to use the system eye of the first author who has good binocular vision.
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
H. Dória Silva et al., "Nutrients and Metabolic Secretions Transfer in Cornea", Defect and Diffusion Forum, Vols. 312-315, pp. 737-742, 2011