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Perimetry

Overview Understanding Clinical Use Key Features What to Expect Advantages Connect with us FAQs

Overview

Overview

Perimetry, also known as visual field testing, is an important diagnostic test used to assess the complete field of vision. It helps detect, monitor and manage diseases and disorders affecting the visual pathway. At Heritage Hospital, our eye specialists use advanced perimetry test in Varanasi to thoroughly evaluate peripheral and central vision in patients experiencing vision problems.

We conduct perimetry tests to evaluate patients reporting symptoms like blurry vision, missing areas in sight, and difficulty seeing under low light. These tests also aid in the diagnosis and management of various ophthalmic disorders, such as glaucoma, cataracts, age-related macular degeneration, retinal conditions, and optic neuropathy.

Understanding

The visual field refers to the entire area where objects can be seen while the eye is focused on a central point. It comprises central vision, enabling detailed sight, as well as peripheral vision on the sides. Perimetry systematically maps the visual field to determine if any areas have reduced sensitivity or blind spots, indicating possible eye disease or damage to the visual pathway.

Perimetry test in Varanasi involves presenting light stimuli of different intensities to the various areas of the visual field while the patient maintains fixation on a central target. It can pick up subtle changes in vision missed during a regular eye exam.

Clinical Applications of Perimetry

Clinical Applications of Perimetry

Perimetry is most commonly used to detect and monitor diseases that affect the visual pathway. The doctors for perimetry test in Varanasi check issues, such as:

  • Glaucoma: Perimetry is essential for diagnosing glaucoma and monitoring its progression. Loss of peripheral vision may indicate glaucomatous optic nerve damage. Regular perimetry is needed to track any further vision loss.

  • Retinal Disorders: Conditions like macular degeneration, diabetic retinopathy or retinitis pigmentosa can also cause visual field defects. Perimetry identifies areas of vision loss associated with retinal damage.

  • Side Effects of Medications: Certain medications can be toxic to the retina and optic nerve over time. Perimetry helps identify early vision changes before significant damage occurs.

  • Neuro-Ophthalmic Lesions: Perimetry localizes lesions in visual pathways due to stroke, inflammation, or tumors based on defect patterns.

  • Cataract: Perimetry helps determine functional impairment from cataracts as well as aid in decisions regarding surgery.

  • Age-Related Macular Degeneration (AMD): Perimetry maps central visual loss in dry AMD and monitors neovascular AMD after anti-VEGF therapy, assessing treatment efficacy. These tests determine the impact of vision loss on daily living activities.

  • Cystoid Macular Edema (CME): Perimetry helps diagnose vision loss arising from cystoid macular edema where fluid accumulation in the central retina occurs due to leaking blood vessels.

Key Features

Key Features

Some key attributes of visual field test in Varanasi are:

  • Precise: Our advanced perimeters incorporate specialized software and hardware with continuous calibrations for highly precise measurements and mapping of the visual field.

  • Repeatable: Our tests produce reliable, consistent results critical for comparing visual fields over time to diagnose and monitor the progression of disorders.

  • Customizable: We personalize tests based on patients' cooperation level, extent of vision loss, and areas needing careful examination to improve test accuracy.

  • Objective: As an inherently objective technique, perimetry removes subjective bias and reliance on patient feedback for visual function assessment.

  • Quantitative: Unlike qualitative descriptions, we obtain quantified, numerical data on visual field damage permitting statistical analysis.

  • Efficient: Our streamlined perimetry testing protocol minimizes fatigue while gathering sufficient information to facilitate clinical decisions.

What to Expect with Diagnostic

What to Expect with Diagnostic

Procedure

Our best doctors for Visual Field Testing in Varanasi advise patients to follow certain preparatory guidelines before undergoing a perimetry test:

  • Discontinue using contact lenses 24-48 hours prior to the exam.

  • Avoid drinking alcohol and caffeine right before the test, as they can affect results.

  • Do not take sedatives, which can cause drowsiness.

  • Refrain from smoking before the test.

  • Wear comfortable clothing without high collars, hats or tight-neck jewelry.

  • Be rested to avoid fatigue during the test.

  • Have someone drive you home as pupils may be dilated.

  • Take a longer rest break if you start experiencing headaches or eye strain during the test.

We educate patients on maintaining proper head position, chin placement, and focusing gaze during the procedure for accurate, reproducible test results. Our doctors for Visual Field Test in Varanasi remain vigilant to prevent factors, including lens fogging, blinks, or eye movements, from affecting data quality.

Post Procedure

A detailed map of the visual field test in Varanasi is generated, showing areas of normal vision versus blind spots or areas of reduced sensitivity. The results are analyzed for patterns of vision loss associated with certain conditions. Key aspects assessed include:

  • Blind Spot Size/Location: An enlarged blind spot may indicate optic nerve damage.

  • Peripheral Vs. Central Vision Loss: Central loss suggests macular disease, while peripheral loss indicates optic neuropathy.

  • Nerve Fiber Bundle Defects: May reflect glaucomatous optic nerve damage.

  • Altitudinal defects: Loss above or below the midline suggests stroke or brain lesions.

  • Generalized Loss Versus Localized Defects: Widespread loss indicates retinal or optic nerve disease versus localized scotomas, which may represent neurological conditions.

The eye doctor interprets the results, taking into account the patient’s symptoms, medical history and clinical exam findings. Further testing like OCT or angiography may be recommended to clarify the diagnosis. Ongoing perimetry at regular intervals is key for monitoring changes over time.

Advantages of Perimetry

Reliable Diagnostic Interpretation

Our experienced medical personnel reliably conduct the test and provide accurate interpretation of results.

High-Tech Perimetry

We utilize the latest, regularly calibrated automated perimeters with advanced analytic software.

Holistic Ophthalmic Evaluation

Perimetry combined with specialized clinical, optical and radiological eye tests facilitates integrated diagnosis and treatment.

Affordable Eye Diagnostics

Our affordable testing services can evaluate diverse conditions causing field defects.

Perimetry Tracking

We maintain comprehensive patient records, including perimetry results, to monitor disease progress.

Early Vision Loss Detection

Early identification of developing vision loss allows timely treatment, preventing permanent impairment.

Multidisciplinary Vision Management

Our multidisciplinary teams craft customized management plans involving medications, surgery, vision rehabilitation, etc.

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FAQ’s

To chart out the shrinkage of visual field in eye conditions / diseases.

The patient sits before a computerized screen.

Rs.1200/- inclusive of all.

Prior payment of full cost is essential. Discounts are usually not permissible.

Who performs this procedure - a Doctor or a Technician ?

Yes

No

Not required.

Patient should be in a state to sit comfortably for 10- 15 minutes.

No precautions

No hospitalization required.

No anaesthesia is required.

Results are printed and provided immediately.

No risk or complications.

May be, but repeat test possible only if the results are actually unsatisfactory.

Yes, money can be refunded if not done due to any reason.