What is Hruby lens?
Hruby lens (Figure 1 & 2) is a high minus (originally -58.6 D) non-contact lens mounted on the slit lamp for stability. It provides a high resolution, upright image of structures in the posterior pole. …
What is fundus contact lens?
Fundus Contact Lens: It is a diagnostic aid that makes a difficult diagnosis simple. The combination of binocular vision, great light intensity and a range of magnification powers using the fundus contact lens and the slit lamp give your ophthalmologist an excellent resolution to view the fundus.
What is Biomicroscopy of the eye?
Ultrasound Biomicroscopy (UBM) is a technique primarily used for imaging of the anterior segment (AS) of the eye. It was first introduced in the early 1990’s by Foster and Pavlin as a way to obtain cross-sections of the eye at microscopic resolution.
Which lens is used in ophthalmoscope?
The viewing system of the instrument (Figure 2) consists of a pair of low-powered convex lenses. This design affords the examiner a stereoscopic view of the virtual image. The +20D lens is the standard lens for general examination offering 3x magnification and a field of view of approximately 45°.
What is 20D lens?
This lens is used for general examination of the fundus using “Binocular Indirect Ophthalmoscope (BIO)”. This provides a high resolution image of the retina in the OPD or the operating room. A 45 degree field of view helps in vizualization upto the mid peripheral region.
How do you use a Hruby lens?
Using the Hruby Lens The concave surface of the lens is placed towards the patient, and aligned so the light beam and oculars of the slit lamp shine through the lens into the patient’s eye. The microscope is then moved forward or backwards until the fundus is brought into focus.
How do you hold a 90 diopter lens?
– Keep the lens centered on the patient’s pupil. – Hold the lens far enough from the patient’s eye so that the retinal image is the same diameter as the lens. – Keep the illumination source as dim as possible to minimize reflections and loss of image contrast.
What are the uses of Slitlamp Biomicroscopy?
The slit lamp is indispensable for the detailed examination of virtually all tissues of the eye and some of its adnexa. It is routinely used for examination of the anterior segment, which includes the anterior vit reous and those structures that are anterior to it.
What is a slit lamp Biomicroscopy surveillance?
When you have an eye checkup, you will likely undergo a slit lamp exam. You will usually have the slit lamp exam at an optometry or ophthalmology office. The exam is also called biomicroscopy. It allows the doctor to microscopically examine your eyes for any abnormalities or problems.