What Is the Difference Between Trifocal and EDOF Lenses?
ANSWER
One of the most important decisions when considering Lens Replacement Surgery (also known as RLE – Refractive Lens Exchange) is choosing the most suitable intraocular lens (IOL). The two most popular premium lens options are Trifocal Lenses and EDOF (Extended Depth of Focus) Lenses.
Both lens types can significantly reduce dependence on glasses, but they are designed for slightly different visual needs and lifestyles.
Trifocal Lenses
Trifocal lenses are designed to provide clear vision at three distances:
✔ Distance vision
✔ Intermediate vision (computer, dashboard)
✔ Near vision (reading, smartphone)
Because trifocal lenses provide vision across all three ranges, they offer the highest level of glasses independence after Lens Replacement Surgery.
Most patients with trifocal lenses can comfortably perform everyday activities such as reading, using a smartphone, working on a computer, driving and watching television without glasses.
For this reason, trifocal lenses are the most popular choice among our patients travelling abroad to Prague for Lens Replacement Surgery.
Approximately 90% of our patients are suitable candidates for premium trifocal lenses.
EDOF Lenses
EDOF stands for Extended Depth of Focus.
Unlike trifocal lenses, EDOF lenses do not split light into three separate focal points. Instead, they create an extended range of vision with a strong emphasis on distance and intermediate vision.
Patients with EDOF lenses can usually enjoy:
✔ Excellent distance vision
✔ Excellent computer and intermediate vision
✔ Functional near vision
✔ High visual quality
✔ Reduced glare and halo effects
Many patients can comfortably perform daily activities without glasses, including driving, using a laptop, watching television and reading menus or messages on their phone.
However, some patients may still occasionally require weak reading glasses for very small print or prolonged reading.
Why Would Someone Choose EDOF Instead of Trifocal Lenses?
Although trifocal lenses provide the greatest level of glasses independence, they are not always the best option for every patient.
EDOF lenses may be recommended for patients who:
✔ Have undergone previous laser eye surgery (LASIK, LASEK or PRK)
✔ Have certain corneal irregularities or scars
✔ Have specific retinal or eye conditions
✔ Prioritise high-quality night vision
✔ Prefer minimal halo and glare effects
For these patients, EDOF lenses can often provide excellent visual outcomes while maintaining exceptional visual quality.
Halo Effects and Neuroadaptation
Patients considering premium trifocal lenses often ask about halos around lights at night.
Halo effects are a normal part of the neuroadaptation process. During the first weeks or months after surgery, the brain gradually learns how to process visual information from the new lenses and adapt to multiple focal distances.
Most patients find that halos become significantly less noticeable over time as adaptation progresses.
Which Lens Is Best?
There is no single lens that is best for everyone.
For most patients over the age of 45 who wear glasses for both distance and reading, premium trifocal lenses offer the highest level of glasses independence and are therefore the most common choice.
However, some patients may achieve better results with EDOF lenses depending on their eye condition, previous eye surgery, lifestyle and visual expectations.
Free Assessment Before Travelling to Prague
Before travelling abroad for Lens Replacement Surgery in Prague, patients can take advantage of our free email consultation.
Simply complete our medical questionnaire and send us your glasses prescription. Our medical team and refractive eye surgeon can often provide an initial opinion on whether trifocal lenses or EDOF lenses may be more suitable.
The final recommendation is always confirmed during a comprehensive 2–3 hour eye examination, measurements and consultation with an eye doctor in Prague.
Why Patients Choose Prague for Lens Replacement Surgery
✔ Premium trifocal and EDOF lenses available
✔ Approximately 90% of patients are suitable candidates for trifocal lenses
✔ Free email consultation before travelling
✔ Comprehensive 2–3 hour eye examination
✔ Experienced refractive eye surgeons
✔ More than 100,000 intraocular procedures performed
✔ Patients from the UK, Ireland, USA, Canada, Australia and New Zealand
Choosing the right lens is one of the most important parts of Lens Replacement Surgery. Our goal is to recommend the lens that will provide the best possible vision and lifestyle benefits for each individual patient.
Apply for a free email consultation by clicking on the button FREE CONSULTATION or contact us, SEND YOUR PRESCRIPTION via Whatsapp at +420 775 178 715.
