What Is the Working Distance for Mohindra Retinoscopy?

The working distance for Mohindra retinoscopy is typically performed at a distance of 50cm from the patient. During this procedure, loose lenses or sciascopy bars are utilized, and the phoropter isn’t used. To calculate the gross findings, the retinoscopy results are determined. It’s important to note that 1.25D should be added to the gross findings to obtain the final value.

What Is Mohindra Retinoscopy Used For?

Mohindra retinoscopy involves the use of a retinoscope, which is a handheld instrument used by optometrists and ophthalmologists to measure refractive errors in the eye. Unlike traditional retinoscopy, which is performed at a distance, Mohindra retinoscopy is conducted at a near working distance, typically between 33 and 40 centimeters.

One of the major advantages of Mohindra retinoscopy is that it can be easily used with infants and young children. Since children may have difficulty maintaining fixation at a distance, conducting retinoscopy at a near working distance allows for more accurate measurements of their refractive errors.

The technique involves shining a beam of light into the childs eye and observing the movement and appearance of the reflections within the eye. By manipulating various lenses, the examiner can determine the presence and magnitude of refractive errors such as myopia (nearsightedness), hyperopia (farsightedness), and astigmatism.

Studies have found good correlation between Mohindra retinoscopy and cycloplegic retinoscopy, which is considered the gold standard for measuring refractive errors. Cycloplegic retinoscopy involves the use of eye drops to temporarily paralyze the focusing muscle of the eye, allowing for more accurate measurements.

By identifying and correcting these refractive errors at an early age, the long-term visual health and development of young individuals can be greatly improved.

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When performing retinoscopy, one of the key aspects to consider is the working distance. This distance refers to the space between the patient’s eye and the practitioner’s retinoscope. For retinoscopy, the standard working distance typically used is 67cm (26″). It’s important to become familiar and comfortable with this distance, as it can be challenging at first, especially when using your non-dominant eye. Like any skill, regular practice will improve your ability to maintain both eyes open and achieve accurate retinoscopy results.

What Is the Working Distance for Retinoscopy?

This distance allows for accurate observation and assessment of the patients refractive error. It provides a good balance between being close enough to the patient to accurately observe the reflexes and being far enough away to avoid any undue discomfort or strain on the examiners eyes.

The working distance of 67cm (26″) is also commonly used because it allows for a convenient and standardized measurement. It’s a distance that can easily be replicated across different examination rooms and clinics, ensuring consistency in retinoscopy techniques and results.

However, it’s important to note that the working distance may vary depending on the specific needs of each patient and examiner.

Source: Plus cylinder retinoscopy instructional video

Retinoscopy is a technique used by eye care professionals to determine a patient’s eyeglass prescription. It involves shining a light into the eye and observing the reflection off the retina. By analyzing the movement and characteristics of the reflected light, the examiner can identify the far point of the eye or the two far point planes in an astigmatic eye. The goal of retinoscopy is to accurately measure the refractive error of the eye, which helps in prescribing the appropriate corrective lenses for optimal vision.

What Is Retinoscopy Used for Quizlet?

Retinoscopy is a diagnostic procedure used to assess a persons vision and determine the appropriate prescription for corrective lenses. This technique is commonly utilized by optometrists and ophthalmologists to evaluate refractive errors, such as nearsightedness, farsightedness, and astigmatism. By examining the way light reflects off the patients retina, the eye care professional can obtain valuable information about the individuals visual acuity and the need for corrective measures.

The primary goal of retinoscopy is to locate the far point of the eye, which is the point at which light rays are focused when the eye is relaxed and accommodated for infinity. By determining the location of this far point, the practitioner can establish the appropriate prescription strength needed to bring the patients vision into focus. In a spherical eye, the far point is a single point; however, in an astigmatic eye, there are two far point planes due to the asymmetrical shape of the cornea or lens.

During retinoscopy, the practitioner employs a retinoscope, a handheld instrument that emits a beam of light. The retinoscope is used in conjunction with a trial lens set, enabling the practitioner to refine the prescription by adjusting the strength of the lenses until the patient achieves clear vision.

Moreover, it allows for the evaluation of complex visual conditions, such as high astigmatism or irregular corneal shape, which may require specialized lenses or other therapeutic interventions.

The Process of Determining a Prescription Strength Through Retinoscopy

  • Step 1: Prepare the equipment
  • Step 2: Dim the lights in the room
  • Step 3: Position the patient
  • Step 4: Use the retinoscope
  • Step 5: Shine light into the patient’s eye
  • Step 6: Observe the reflex movement
  • Step 7: Adjust the lens to neutralize movement
  • Step 8: Repeat for the other eye
  • Step 9: Determine the prescription strength
  • Step 10: Document findings and discuss with patient


This approach offers a precise and reliable method for assessing and correcting refractive errors in patients, ultimately facilitating improved visual acuity and overall eye health.