Cataract and lens condition
Cataract with planned phacoemulsification and IOL implantation.
About the service
A monofocal IOL has one principal optical focus. Selection includes lens-power calculation and discussion of the target viewing distance and possible need for glasses.
Who the service is for
Optical correction
Patients prioritising high-quality vision at one chosen distance and accepting spectacles for another.
Macular region
Macular, optic-nerve, corneal disease or glaucoma where complex presbyopia-correcting optics may be undesirable.
Laser correction for astigmatism
Patients with regular corneal astigmatism when a monofocal toric IOL is being considered.
Intraocular-lens selection
Patients after LASIK, PRK, SMILE or radial keratotomy who require particularly careful IOL calculation.
Binocular vision
Patients willing to discuss monovision/mini-monovision and understand the binocular trade-offs.
Posterior capsule opacification
IOL implantation is part of intraocular surgery and therefore carries surgical risks, including infection, inflammation, increased intraocular pressure, corneal or macular oedema, posterior capsule rupture, IOL decentration, posterior capsule opacification and retinal complications. A monofocal IOL does not guarantee freedom from glare, halos, residual astigmatism or spectacles.
Astigmatism
Significant regular astigmatism may remain with a non-toric monofocal lens, so a toric IOL may be considered.
An individual plan
People for whom night driving, contrast and minimising complex photic phenomena are high priorities after individual assessment.
Intermediate-distance vision
Before consultation, consider which viewing distances matter most: driving and outdoors, computers and dashboards, reading or daily tasks. Tell the doctor about glaucoma, macular and retinal disease, diabetes, corneal operations, LASIK/PRK/SMILE, vitrectomy and significant astigmatism.
Optical correction
Do not choose a lens solely by price or brand: first establish the refractive target and check whether the optical design suits your eye.
When urgent care is needed
Urgent review is required for sudden visual loss, severe pain, marked redness, flashes, a curtain-like shadow or a sudden increase in floaters.
Limitations and safety
IOL implantation is part of intraocular surgery and therefore carries surgical risks, including infection, inflammation, increased intraocular pressure, corneal or macular oedema, posterior capsule rupture, IOL decentration, posterior capsule opacification and retinal complications.
Book a consultation
Stages
Stage 1
Visual needs
Distance, computers, reading, night driving and willingness to use glasses.
Stage 2
Eye examination
Cataract confirmation and corneal, pressure, macular, retinal and optic nerve assessment.
Stage 3
Keratometry and biometry
Corneal and eye-length measurements for IOL calculation.
Stage 4
Selecting the refractive target
Distance, near or an individual strategy including monovision discussion.
Stage 5
Selecting the class
Standard, enhanced or toric monofocal IOL when indicated.
Stage 6
Model and price verification
Lens availability, power, calculation and surgical tariff terms.
Stage 7
Final preoperative check
Model, power, eye, target and implantation plan.
Service benefits
A clear priority focus
A monofocal IOL is calculated for a chosen distance; glasses may be needed at other distances.
No splitting of light between multiple foci
Standard monofocal optics do not split light between multiple foci as a multifocal lens does.
Compatibility with eye health
Optics are selected according to retinal, corneal and optic nerve health, with the model's benefits and limitations discussed.
A coordinated plan for both eyes
The target refraction is discussed with consideration of the fellow eye and everyday visual tasks.
A. Monofocal IOL versus alternative optical classes
Criterion
Conventional monofocal
Enhanced monofocal
Multifocal / trifocal
EDOF
Optical principle
One focus
One principal focus with more intermediate function
Multiple focal zones
Extended depth of focus
Distance vision
Usually prioritised when targeted for distance
Comparable distance target
Can be good with accurate calculation
Usually a strength
Intermediate vision
Often limited without spectacles
Usually better than conventional monofocal
Depends on design
A key purpose
Near without glasses
Usually limited
Usually limited
Greater chance of spectacle independence
Spectacles are often needed for small print and fine near tasks.
Halos / glare
Possible, but fewer complex multifocal phenomena in general
Usually monofocal-like profile; model dependent
More likely
Possible; their severity depends on the design.
Ocular comorbidity
Often considered a conservative option
May be considered individually
Stricter selection needed
Selection needed
Spectacles after surgery
Often needed for another distance
Often still needed for near
May still be needed despite reduced dependence goal
May be needed for near
Conventional monofocal
Optical principle
Distance vision
Intermediate vision
Near without glasses
Halos / glare
Ocular comorbidity
Spectacles after surgery
One focus
Usually prioritised when targeted for distance
Often limited without spectacles
Usually limited
Possible, but fewer complex multifocal phenomena in general
Often considered a conservative option
Often needed for another distance
One principal focus with more intermediate function
Comparable distance target
Usually better than conventional monofocal
Usually limited
Usually monofocal-like profile; model dependent
May be considered individually
Often still needed for near
Multiple focal zones
Can be good with accurate calculation
Depends on design
Greater chance of spectacle independence
More likely
Stricter selection needed
May still be needed despite reduced dependence goal
Extended depth of focus
Usually a strength
A key purpose
Spectacles are often needed for small print and fine near tasks.
Possible; their severity depends on the design.
Selection needed
May be needed for near
B. Selection by clinical scenario
Scenario
Preferred discussion logic
Why
Patient counselling
Priority: distance and night driving
Conventional/aspheric monofocal; enhanced individually
One principal focus and conservative optics
Reading and some computer spectacles may remain necessary
Computer is a daily priority
Enhanced monofocal or another strategy after testing
More functional intermediate vision may be possible
Spectacle-free reading of small print is not guaranteed.
Regular astigmatism
Monofocal toric
Corrects cylinder component
Accurate measurements and rotational stability are required
Glaucoma / macular disease
Conventional monofocal is often discussed
Complex optics may further reduce image quality.
Prognosis depends on the underlying disease
Strong desire to minimise glasses at all distances
Compare with EDOF/trifocal if the eye is suitable
A conventional monofocal does not cover all distances
Premium optics have their own photic trade-offs
Previous laser vision correction
Monofocal is possible but calculation is harder
Corneal optics have changed
Residual refractive error is less predictable
Willing to try monovision
Discuss/test mini-monovision
May reduce spectacle dependence without multifocal optics
Stereoacuity and adaptation trade-offs are possible
Preferred discussion logic
Priority: distance and night driving
Computer is a daily priority
Regular astigmatism
Glaucoma / macular disease
Strong desire to minimise glasses at all distances
Previous laser vision correction
Willing to try monovision
Conventional/aspheric monofocal; enhanced individually
Enhanced monofocal or another strategy after testing
Monofocal toric
Conventional monofocal is often discussed
Compare with EDOF/trifocal if the eye is suitable
Monofocal is possible but calculation is harder
Discuss/test mini-monovision
One principal focus and conservative optics
More functional intermediate vision may be possible
Corrects cylinder component
Complex optics may further reduce image quality.
A conventional monofocal does not cover all distances
Corneal optics have changed
May reduce spectacle dependence without multifocal optics
Reading and some computer spectacles may remain necessary
Spectacle-free reading of small print is not guaranteed.
Accurate measurements and rotational stability are required
Prognosis depends on the underlying disease
Premium optics have their own photic trade-offs
Residual refractive error is less predictable
Stereoacuity and adaptation trade-offs are possible
C. Measurements affecting selection and calculation
Method / parameter
Keratometry
Contact IOL calculation
IOL Master
Macular OCT
Pentacam / corneal tomography
What it provides
Corneal curvature / power
Ultrasound-based calculation pathway
Non-contact optical biometry
Central retinal assessment
Anterior-segment shape and optics
When especially important
IOL and astigmatism planning
When optical biometry is limited or per protocol
Routine IOL calculation
When macular disease may limit visual quality
Irregular cornea, astigmatism, premium/toric planning
KazRIED price
from 1 800 ₸
from 3 200 ₸
Cost determined after consultation
from 4 900 ₸
from 4 400 ₸
Keratometry
What it provides
When especially important
KazRIED price
Corneal curvature / power
IOL and astigmatism planning
from 1 800 ₸
Ultrasound-based calculation pathway
When optical biometry is limited or per protocol
from 3 200 ₸
Non-contact optical biometry
Routine IOL calculation
Cost determined after consultation
Central retinal assessment
When macular disease may limit visual quality
from 4 900 ₸
Anterior-segment shape and optics
Irregular cornea, astigmatism, premium/toric planning
from 4 400 ₸
Book an appointment
Book cataract diagnostics and a KazRIED ophthalmic-surgeon consultation. After biometry, the surgeon can define the refractive target, calculate IOL power and compare suitable monofocal models with alternatives.
Procedure prices
Service name
Price
Acreos Adapt AO (per lens)
from 40 500 ₸
SENSAR AAB00 (per lens)
from 45 500 ₸
RayOne RAO (per lens)
from 62 500 ₸
AquaFree Yellow Aspheric (per lens)
from 47 000 ₸
SA non-aspheric, no yellow filter (per lens)
from 51 000 ₸
HOYA iSert 250/251 (per lens)
from 66 500 ₸
CT Lucia 601 PY + injector (per lens)
from 55 000 ₸
TECNIS ZCB00 (per lens)
from 57 500 ₸
TECNIS OptiBlue ZCB00V (per lens)
from 98 000 ₸
Foldable aspheric IQ (per lens)
from 101 000 ₸
TECNIS Eyhance ICB00 (per lens)
from 103 000 ₸
UltraSert (per lens)
from 132 000 ₸
Clareon (per lens)
from 157 000 ₸
TECNIS Toric (per lens)
from 140 000 ₸
TECNIS Eyhance Toric II (per lens)
from 234 000 ₸
Contact IOL calculation (per eye)
from 3 200 ₸
Phaco, uncomplicated cataract + IOL (per eye)
from 366 000 ₸
Our doctors
A team of experienced doctors across specialties.
Experience: 25 years
Head
Aubakirova Alua Sauytbekovna
Candidate of Medical Sciences; Highest-category ophthalmologist
Experience: 32 years
Sabyrbaev Nurlan Berdauletovich
Candidate of Medical Sciences; Highest-category ophthalmologist
Experience: 26 years
Ophthalmologist
Tuletova Aygerim Serikbaevna
Candidate of Medical Sciences; Highest-category ophthalmologist
Experience: 17 years
Ophthalmologist
Dzhapparkhanova Asel Urazovna
Highest-category ophthalmologist
Experience: 13 years
Ophthalmologist
Kalshabekov Alibi Sembaevich
Highest-category ophthalmologist
Experience: 12 years
Ophthalmologist
Tadzhimetov Murat Mikhaylovich
Highest-category ophthalmologist
Experience: 17 years
Ophthalmologist
Tokymbaeva Zhenisgul Nurmankyzy
Highest-category ophthalmologist
Experience: 8 years
Ophthalmologist
Asylanqyzy Aygerim
First-category ophthalmologist
Experience: 8 years
Ophthalmologist
Zhumakhanova Symbat Qymbatqyzy
First-category ophthalmologist
Experience: 10 years
Ophthalmologist
Qyryqbaev Dastan Rakhmetollauly
First-category ophthalmologist
Monofocal IOLs: focusing and expected vision
A monofocal lens does not change focus like a young natural crystalline lens. The surgeon selects the target refraction in advance and calculates the optical power of the intraocular lens (IOL).
Which distance is the lens calculated for?
With a standard strategy, one or both eyes are usually targeted for good distance vision. Glasses may be needed after surgery for reading and some intermediate tasks.
In selected cases, a near-vision target or monovision or mini-monovision may be discussed, with intentionally different refractive targets for the two eyes.
How do enhanced monofocal lenses differ?
Enhanced monofocal lenses, such as TECNIS Eyhance, retain the monofocal concept but may provide more functional intermediate vision than a conventional monofocal model.
This does not guarantee near vision without glasses.
When are monofocal optics considered?
Monofocal optics are often considered in patients with corneal, macular, or optic nerve disease, or glaucoma, when the clinician aims to avoid additional trade-offs associated with complex multifocal optics.
The decision always depends on the individual condition of the eye.
Which options are available at KazRIED?
KazRIED offers standard aspheric and enhanced monofocal models. Toric monofocal options may be considered for regular corneal astigmatism.
Additional advice and situations
Assessing vision after surgery
The postoperative result depends not only on the IOL but also on the cornea, macula, optic nerve and accuracy of calculations. Once refraction stabilises, the clinician determines whether spectacles are needed for reading, computer work or distance. If vision declines months or years later, the assessment should include refraction, posterior capsule, retina, macula, intraocular pressure and IOL position.
Acreos Adapt AO
Acreos Adapt AO: Monofocal aspheric platform; confirm availability
Lens position behind the iris
SENSAR AAB00: One-piece posterior-chamber IOL
Intraocular-lens selection
RayOne RAO: Flexible one-piece IOL
HOYA iSert 250/251: Pseudophakic IOL
CT Lucia 601 PY + injector: Aspheric posterior-chamber IOL
TECNIS OptiBlue ZCB00V: Monofocal acrylic IOL
UltraSert: Aspheric IOL; confirm exact lens model
Clareon: Aspheric hydrophobic acrylic monofocal
TECNIS Toric: A toric monofocal IOL.
TECNIS Eyhance Toric II: A toric enhanced monofocal IOL.
IOL Master: Non-contact calculation
Facts and offers
Kazakhstan’s first specialized ophthalmology institute, operating since 1933.
Modern diagnostics and surgery using world-class equipment.
Leading ophthalmologists in Kazakhstan, scientists and experienced surgeons.
More than 30,000 operations and around 270,000 consultations annually.
Kazakhstan’s first specialized ophthalmology institute, operating since 1933.
Modern diagnostics and surgery using world-class equipment.
Leading ophthalmologists in Kazakhstan, scientists and experienced surgeons.
More than 30,000 operations and around 270,000 consultations annually.
Kazakhstan’s first specialized ophthalmology institute, operating since 1933.
Modern diagnostics and surgery using world-class equipment.
Leading ophthalmologists in Kazakhstan, scientists and experienced surgeons.
More than 30,000 operations and around 270,000 consultations annually.
Related services
Frequently asked questions
What is a monofocal IOL?
A monofocal IOL is an artificial intraocular lens with one principal focus, usually implanted to replace the natural lens removed during cataract surgery.
At what distance will I see without glasses after a monofocal IOL?
It depends on the selected refractive target. Most commonly the IOL is targeted for distance vision, although another optical target may be selected in some patients.
Will I need glasses after a monofocal IOL?
Often yes. If the lens is targeted for distance, reading glasses are usually needed and spectacles may also be required for some intermediate tasks. Residual refractive error may also require correction.
Can a monofocal IOL be targeted for near vision?
Yes. In suitable patients, a refractive target favoring near vision can be selected. Distance vision may then be less clear without additional correction.
What is an enhanced monofocal IOL?
It is a monofocal IOL with modified optics designed to broaden functional vision compared with a conventional monofocal lens, most commonly by improving intermediate vision. Performance depends on the specific model.
Is TECNIS Eyhance a multifocal IOL?
No. TECNIS Eyhance is an enhanced monofocal IOL. Its optical design is intended to slightly extend depth of focus and improve intermediate vision compared with a conventional monofocal lens.
How does a monofocal IOL differ from a trifocal IOL?
A monofocal IOL has one principal focus. A trifocal IOL distributes light to provide useful vision at several distances, typically far, intermediate and near, resulting in different visual benefits and optical trade-offs.
Which is better, a monofocal or multifocal IOL?
There is no universally better option. Selection depends on corneal, retinal and optic-nerve health, near and distance visual priorities, lifestyle and willingness to accept possible optical phenomena.
Why are monofocal IOLs often considered in retinal disease?
Macular or retinal disease may already reduce visual potential and contrast sensitivity. A surgeon may therefore prefer simpler monofocal optics rather than adding the optical trade-offs of more complex multifocal designs.
Can a monofocal IOL be used in glaucoma?
Often yes. Selection depends on glaucoma stage, optic-nerve status, visual field, other ocular disease and the patient’s visual needs.