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  Indian J Med Microbiol
 

Figure 6: Schematic representation of angle lambda and corneal light reflex positioning. (a) Normal angle lambda (λ) between the patient's line of sight (directed at the examiner's handlight) and pupillary axis is associated with slight nasalward positioning of the corneal light reflex (the reflection of the handlight from the anterior surface of the cornea) with respect to the pupillary center. (b) Eye with normal angle lambda (λ) is not fixating on the handlight, with strabismic deviation (δ), showing nasalward displacement of the corneal light reflex from the pupillary center. Note the imaginary string that connects the corneal center of curvature (CR) with the handlight. (c) Large angle lambda (λ+) caused by a temporally dragged, but fixating fovea, showing the same amount of nasalward displacement of the corneal light reflex from the pupillary center as in (b) with the deviated eye with normal angle lambda (λ) not fixating on the handlight

Figure 6: Schematic representation of angle lambda and corneal light reflex positioning. (a) Normal angle lambda (λ) between the patient's line of sight (directed at the examiner's handlight) and pupillary axis is associated with slight nasalward positioning of the corneal light reflex (the reflection of the handlight from the anterior surface of the cornea) with respect to the pupillary center. (b) Eye with normal angle lambda (λ) is not fixating on the handlight, with strabismic deviation (δ), showing nasalward displacement of the corneal light reflex from the pupillary center. Note the imaginary string that connects the corneal center of curvature (CR) with the handlight. (c) Large angle lambda (λ+) caused by a temporally dragged, but fixating fovea, showing the same amount of nasalward displacement of the corneal light reflex from the pupillary center as in (b) with the deviated eye with normal angle lambda (λ) not fixating on the handlight