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Optical problems of anterior chamber depth biometry by scheimpflug photography
1University Eye Hospital Mainz, FRG.
Abstract:
For the first time, the Scheimpflug camera was used in the comparative investigation of the anterior chamber depth. Comparative measurements were carried out by a device developed by Jaeger, a clinically and scientifically proved method in anterior chamber depth determination. The physical problems of measuring the anterior chamber depth by using optical methods can be shown by the examination demonstrated here. The apparent change of the cornea profile depending on the cornea radius, which you can see in optical investigations, schematically described by Collignon-Brach, can be represented photographically by the Scheimpflug image.
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Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:

