Essays
Focus On
W
Wave Front Technology -
Part 1
Measuring Eye Aberrations and Correction with Contact Lenses?
By John de Brabander, PhD, FAAO. John de Brabander is Senior Lecturer at the University of Maastricht, The Netherlands. His teaching and research assignments involve all aspects of measuring the human visual system in relation to diagnosticprocedures and optical correction.In a series of three articles, John will give us the backgrounds we need to understand the basis of wave front technology. A technology many in the contact lens industry believe will cause a dramatic change in the coming years. The editors of Global CONTACT are happy to offer a series of basic articles on this subject which will be very informative.
happens if we apply such lenses to the human visual system? Is something like super vision possible? The articles are not specially written for scientists, clinicians or technicians. Our primary aim is to make the subject understandable for all that are involved in the area of contact lenses. For a better understanding later on we briefly describe some optical principles. This first article in the series gives a broad overview on the subject, with emphasis on some historical facts, some updates on existing techniques today, some ideas that have been expressed in the field, and also we report on some dreams for future possibilities.
In order to explain Snell’s law, Isaac Newton (1643 – 1727) postulated that light consists of many small particles. With this idea it has become possible to explain that light will bounce off of a solid surface (mirror reflection) and does the same if it hits an optical substance like a glass plate under a critical angle (total reflection). Under circumstances that light rays enter optical media, their direction of travel changes according to Snell’s law (refraction). The explanation by Newton on Snell’s law was that refraction must be due to a higher(!) speed of the light particles in media like
W
Wave Front Technology -
Part 1
Measuring Eye Aberrations and Correction with Contact Lenses?
By John de Brabander, PhD, FAAO. John de Brabander is Senior Lecturer at the University of Maastricht, The Netherlands. His teaching and research assignments involve all aspects of measuring the human visual system in relation to diagnosticprocedures and optical correction.In a series of three articles, John will give us the backgrounds we need to understand the basis of wave front technology. A technology many in the contact lens industry believe will cause a dramatic change in the coming years. The editors of Global CONTACT are happy to offer a series of basic articles on this subject which will be very informative.
happens if we apply such lenses to the human visual system? Is something like super vision possible? The articles are not specially written for scientists, clinicians or technicians. Our primary aim is to make the subject understandable for all that are involved in the area of contact lenses. For a better understanding later on we briefly describe some optical principles. This first article in the series gives a broad overview on the subject, with emphasis on some historical facts, some updates on existing techniques today, some ideas that have been expressed in the field, and also we report on some dreams for future possibilities.
In order to explain Snell’s law, Isaac Newton (1643 – 1727) postulated that light consists of many small particles. With this idea it has become possible to explain that light will bounce off of a solid surface (mirror reflection) and does the same if it hits an optical substance like a glass plate under a critical angle (total reflection). Under circumstances that light rays enter optical media, their direction of travel changes according to Snell’s law (refraction). The explanation by Newton on Snell’s law was that refraction must be due to a higher(!) speed of the light particles in media like