Contact Lens Power Calculator – Find Your Perfect Fit | Vision Drishti

🔍 Understanding Contact Lens Power Conversion

Are you struggling to convert your eyeglass prescription to contact lens power? Our Contact Lens Power Calculator makes it easy! Whether you have myopia (nearsightedness), hyperopia (farsightedness), astigmatism, or presbyopia, this tool helps you find the right contact lens power based on your spectacle prescription.

📌 Why Use a Contact Lens Power Calculator?

Accurate Conversion: Eyeglass and contact lens powers differ due to vertex distance (the space between your eye and the lens).
Personalized Fit: Avoid discomfort from incorrect power by using our scientifically validated calculator.
Time-Saving: Skip manual calculations—get instant results for spherical, toric (astigmatism), and multifocal lenses.

🔬 How Does It Work?

Our calculator applies the vertex distance formula to adjust your prescription:

Formula:

Vertex Distance: Typically 12mm (0.012m) for most prescriptions.
Negative Power (Myopia): Contact lens power will be less minus than glasses.
Positive Power (Hyperopia): Contact lens power will be less plus than glasses.

👓 How to Use Our Contact Lens Power Calculator

Step 1: Enter Your Spectacle Prescription

SPH (Sphere): The main power for nearsightedness (-) or farsightedness (+).
CYL (Cylinder): Needed if you have astigmatism (toric lenses).
AXIS: The orientation of astigmatism correction (1° to 180°).
ADD Power: For multifocal/bifocal lenses (if needed).

Step 2: Select Lens Type

Spherical Lenses: For simple myopia/hyperopia.
Toric Lenses: For astigmatism correction.
Multifocal Lenses: For presbyopia (age-related near vision loss).

Step 3: Get Your Contact Lens Power

The calculator instantly converts your glasses prescription to the ideal contact lens power for a perfect fit.

ℹ️ Important Notes About Contact Lens Prescriptions

Glasses prescriptions cannot be directly used for contact lenses, because glasses sit farther from the eyes. Always consult an optometrist before ordering contacts.
Contact lens power is often different from glasses due to vertex distance, since lenses sit directly on the cornea.
Toric lenses (for astigmatism) require both CYL and AXIS values for proper fitting.
It’s best to update your contact lens prescription every year, as vision can change over time.

👁️‍🗨️ Final Thoughts

Choosing the correct contact lens power is crucial for clear vision and comfort. While our calculator provides a close estimate, always consult an eye care professional for precise fitting.

🔗 Try Our Free Contact Lens Power Calculator Now!

📢 Have questions? Drop them in the comments below 👇