Incomitant Deviations
Nature of Incomitant Deviations In some deviations, strabismus or heterophoria, the angle of the deviation varies as the patient moves the eyes to look in different parts of the field….
An Overview of the Management of Strabismus
The previous chapters have described techniques that can be used to investigate and treat strabismus. This chapter provides a clinical guide on how these methods should be applied to different…
Techniques in the Investigation and Management of Comitant Strabismus
When to Treat Comitant Strabismus The first stage in the investigation of strabismus is to discover whether there is any pathological cause for the strabismus. If pathology is present, the…
Microtropia
Microtropia ( Lang, 1966 ), or microsquint, may be found as an apparently primary condition, or may be present as a residual deviation after the treatment of a larger strabismus….
Amblyopia and Eccentric Fixation
Amblyopia Definition Hippocrates in 400 BCE described amblyopia as ‘when the doctor and patient see nothing’ ( Day, 1997 ). Lyle and Wybar (1967) defined amblyopia as ‘a condition of…
Eye Exercises for Heterophoria
The preceding chapters on various heterophoric anomalies have described the general outlines for the management of these conditions. This chapter gives details of particular exercises which may be fitted into…
Overview of Sensory Changes in Strabismus
Binocular Sensory Changes in Strabismus Diplopia and Confusion Diplopia occurs when a patient sees two images of one object. Fig. 12.1 A represents an adult with recent onset left esotropia….
Anisometropia and Aniseikonia
Binocular vision can be disturbed by large differences in the refractive error between the two eyes: anisometropia . When this is left uncorrected, central suppression areas can develop in the…
Evaluation of Heterophoria
Introduction A heterophoria only requires treatment if it is causing symptoms or impaired performance, if the binocular status is likely to deteriorate if it is not treated, or if the…
