*Lens mass transfer defect*


### *Pathological eye movements and related symptoms*

• *Cyclotorsion* [13]: Common pathological movement resulting from the cornea accommodation difficulty. This pathology can produce movement perception in static images or graphic montages, make it difficult to count elements of an

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*Intraocular Forced Convection Mechanism Defect as Probable Cause of Normal-Tension…*

equal character set without the use of a pointer, and cause dizziness and nausea

*Saccadic eye movements*: Common pathological movements caused by the metabolic residue accumulation stored in drops (forming small lenses with different transparencies, sizes, and viscosities) in the cornea and lens [7]. The rectus muscles perform these movements and are antagonistic to the instantaneous displacements of image projection on the temporal retina caused by the change of droplets in the passage of light rays. See Scheiner's experiment, *apud* [12]. Vergence eye move-

• *Photosensitive epilepsy*: This is triggered by resonant neural impulses caused by visual stimuli [2]. Resonant impulses may be formed by antagonistic responses to eye control stimuli. Antagonistic responses can be constructed by image transmissions through alternations between the metabolic residue droplets stored in the cornea and lens. Droplet alterations may be produced as result of lens accommodation. Then, when the accommodation process begins, the droplets are physically repositioned causing changes in the size and position of the image projection on the retina, which can be interpreted by the brain as a change in distance from the fixation point. The change in distance forces the brain to send a new neural stimulus to accommodate the lens, in many cases antagonistic, modifying the position of the droplets. Frequent recurrence of these actions can trigger resonant neural impulses. Therefore, the eye that holds the interest point in its temporal retina controls the movement of the eyes, as shown in *binocular motion physiology*. But, because refractive error occurs in both eyes, the point of interest may either be projected on the temporal retinas or on both nasal retinas. (Note: in normal vision, the point of interest is projected on the temporal retina of one eye and on the nasal of the other.) Projecting the interest point on the temporal retinas causes the brain to generate conflicting commands in both eyes. By projecting the inter-

est point on the nasal retinas, the brain loses its command sense.

residual drops as observed by Scheiner's experiment, *apud* [12].

the pathology may be combined with the *fixation instability*.

upper nasal region.

tor of this serious pathology.

• *Anterior uveitis*: This may be caused by superior oblique muscle overuse. It is symptomatically characterized by pain caused by a slight pressure on the muscle through the eyelid. In the patient, this always occurred in the left eye

• *Pterygium*: Excessive movement of the rectus muscle may cause this, in order to compensate for a jump in image as a result of the formation of metabolic

• *Fixation instability*: This is easily observed in a dark environment, through the light path projected on the retina resulting from the head oscillatory rotation when the gaze fixed on a luminous LED. Motion perception in still images [14], stereoscopic depth, as well as the need for a pointer to count a large set of equal characters are some of the symptoms resulting from this pathology. Imperfections of the anterior surface of the cornea can be an important indica-

• *Tendinitis*: The occurrence was observed during manual activities with the near fixation point, during the removal of intraocular metabolic residues; however,

• *Disequilibrium*: This may occur because of pathological cyclotorsional movement. It may or may not be discreet. It can even form a dry callus [3].

*DOI: http://dx.doi.org/10.5772/intechopen.89934*

(incyclotorsion, excyclotorsion).

ments are only observed if saccadic movements exist.

*Intraocular Forced Convection Mechanism Defect as Probable Cause of Normal-Tension… DOI: http://dx.doi.org/10.5772/intechopen.89934*

equal character set without the use of a pointer, and cause dizziness and nausea (incyclotorsion, excyclotorsion).

*Saccadic eye movements*: Common pathological movements caused by the metabolic residue accumulation stored in drops (forming small lenses with different transparencies, sizes, and viscosities) in the cornea and lens [7]. The rectus muscles perform these movements and are antagonistic to the instantaneous displacements of image projection on the temporal retina caused by the change of droplets in the passage of light rays. See Scheiner's experiment, *apud* [12]. Vergence eye movements are only observed if saccadic movements exist.

