BACKGROUND/AIMS Microtropia is believed to be a static condition, in which accepted achievable levels of vision are those of 6/12–6/9 maximum, with the inability to achieve “normal” levels of stereopsis. The aim of this paper was to present the results of treatment of 30 consecutively presenting primary microtropes, and assess their outcomes using a more active treatment strategy than that conventionally used.
METHODS Visual acuity, stereoacuity, fixation, and the presence of a central suppression scotoma were assessed in all patients before, during, and after treatment, which comprised wearing maximum refractive correction, and an occlusion strategy aiming for equal visual acuity.
RESULTS Equal visual acuity of 6/5 Snellen was achieved in 43% of the 30 patients, while 87% achieved 6/9 Snellen or better visual acuity in the microtropic eye. Stereoacuity of better than 60" of arc was attained in 37%, and foveal fixation on visuscopy in 55%. The treatment outcome was not affected by the patient’s age, initial visual acuity, or the amount of anisometropia. A change in the patient’s diagnosis was noted in 50%, with nine patients recovering completely.
CONCLUSIONS The results show that microtropia is not static. Equal 6/5 vision is attainable, as is high grade stereoacuity. The pattern of fixation may change during treatment and elimination of the microtropia is possible in some cases. There is a requirement for management protocols to be changed in order to treat this condition more effectively.
Taken from @ bjo.bmj.com/content/82/3/219.full
Stereopsis (from the Greek στερεο- stereo- meaning “solid”, and ὄψις opsis, “appearance, sight”) is a term that is most often used to refer to the perception of depth and 3-dimensional structure obtained on the basis of visual information deriving from two eyes by individuals with normally developed binocular vision.[1] Because the eyes of humans, and many animals, are located at different lateral positions on the head, binocular vision results in two slightly different images projected to the retinas of the eyes.
See @ en.wikipedia.org/wiki/Stereopsis
Binocular vision is vision in which creatures having two eyes use them together. The word binocular comes from two Latin roots, bini for double, and oculus for eye.[1] According to Fahle (1987),[2] having two eyes confers six advantages over having one.
It gives a creature a spare eye in case one is damaged.
It gives a wider field of view. For example, humans have a maximum horizontal field of view of approximately 190 degrees with two eyes, approximately 120 degrees of which makes up the binocular field of view (seen by both eyes) flanked by two uniocular fields (seen by only one eye) of approximately 40 degrees.[3]
It can give stereopsis in which binocular disparity (or parallax) provided by the two eyes’ different positions on the head gives precise depth perception. This also allows a creature to break the camouflage of another creature.
It allows the angles of the eyes’ lines of sight, relative to each other (vergence), and those lines relative to a particular object (gaze angle) to be determined from the images in the two eyes.[4] These properties are necessary for the third advantage.
It allows a creature to see more of, or all of, an object behind an obstacle. This advantage was pointed out by Leonardo da Vinci, who noted that a vertical column closer to the eyes than an object at which a creature is looking might block some of the object from the left eye but that that part of the object might be visible to the right eye.
It gives binocular summation in which the ability to detect faint objects is enhanced.[5]
See @ en.wikipedia.org/wiki/Binocular_vision
In conclusion you probably are unlikely to get a licence without surgery or having to wear glasses but as DVLA are tightening the rules & regs you might be unlucky!
