Key Differences Between Retinoscope, Ophthalmoscope, and Non-Contact Tonometers: Optimized Optical Layouts for Accurate Eye Examinations
Introduction In this article, we will explore the construction and optical layout of both the retinoscope and the ophthalmoscope, highlighting their unique designs and functionalities. Understanding these differences is crucial for professionals looking to select the most suitable tool for precise eye examinations. Whether you are focusing on the improved accuracy of a retinoscope or […]
Keratometer Optical Design
In this article, we will continue our description of different optical instruments used by optometrists. Last time we talked about Ophthalmoscopes, today we will talk about another very common optical instrument called the Keratometer. The keratometer was developed in 1851, it is used to measure the curvature of the anterior cornea. That is the outer […]
Deciphering 4f Optical Systems: A Journey into Fourier Optics
Introduction A 4F optical system is a system architecture that uses Fourier Optics. In this article, we will explain why we need them and how to design a simple 4f correlator. We will leave out most of the mathematical derivations, but if you are interested in digging more in depth, we highly recommend “Introduction to […]