Milton Eye and Vision Care - Dr Ron Strohan

When Is It Too Late to Treat Lazy Eye?


Eye Care, Lazy Eye

July 31, 2023

Treating Lazy Eye

Lazy eye, or amblyopia, is a condition that occurs when there’s a disruption in the normal development of vision during childhood, leading to reduced vision in one eye. Early detection of lazy eye can result in strengthened vision.

Routine children’s eye exams can assess an infant’s or child’s vision in both eyes to see if one is weaker or has poorer vision. Even without early diagnosis, treatment for lazy eye is possible. However, the effectiveness of treatment may vary depending on the age at which it is diagnosed and addressed.

Understanding Lazy Eye

Lazy eye typically develops during early childhood. With lazy eye, there’s a significant difference in the refractive error or prescription between the two eyes.

When one eye has better focus or alignment, the brain relies more on the “stronger” eye, neglecting signals from the weaker eye. Over time, the brain’s preference for better vision results in reduced visual acuity and poor depth perception in the affected eye.

Lazy eye can result from developmental problems in the brain and the following:

  • Strabismus (misaligned eyes).
  • Family history of amblyopia.
  • Damage to one of your eyes from trauma.
  • Drooping of one of your eyelids.
  • Vitamin A deficiency.
  • Corneal ulcer or scar.
  • Eye surgery.
  • Refractive errors, such as nearsightedness, farsightedness, or astigmatism.
  • Glaucoma, which is high pressure in your eye that can lead to vision problems and blindness.

Lazy eye isn’t always easy to notice in children. Symptoms or signs of lazy eye can include:

  • Bumping into objects on one side.
  • An eye wandering inward or outward.
  • Eyes not working together.
  • Poor depth perception.
  • Double vision.
  • Squinting .

Early Intervention Is Key

The earlier lazy eye is detected and treated, the higher the chances of successful outcomes. During early childhood, the visual system continues to develop until age 9 to 12, and the brain is more receptive to visual input.

This plasticity allows for improvements in visual acuity and binocular vision. Binocular vision is when you have a properly working visual system, and your brain receives signals from both eyes to create an image.

Typically, the recommendation is that infants undergo a comprehensive eye examination by an optometrist or ophthalmologist before they turn one, and follow regular screenings throughout childhood. The recommended eye exam schedule includes:

  • One eye exam between the ages of 2 and 5 years.
  • Annual exams in school children aged 6 to 19 years.

During a children’s eye exam, your eye doctor will conduct tests to check vision clarity, eye muscle strength, and focusing ability. They can do this in the following ways:

  • Asking your child to identify letters or shapes on a chart.
  • Having your child follow a light with each eye, and then both eyes.
  • Looking at their eyes through a magnifying device .

Is It Too Late to Treat Lazy Eye?

As a general guideline, the earlier the treatment, the better the chances for improvement. After age 8, vision improvement can drop significantly, but this doesn’t mean treatment will be ineffective beyond this age.

Evidence shows that treatment for lazy eye in older children does result in improvements in visual function. One study found that 53% of children aged 7–12 showed a positve treatment response.

It’s important to note that the extent of improvement may vary in individuals. Regular visits to your eye doctor can help determine effectiveness even after the critical period has passed.

Treatment Options for Lazy Eye

Treatment Options for Lazy Eye

The primary goal of lazy eye treatment is to strengthen the weaker eye and promote binocular vision. A common treatment approach is to patch the stronger eye, forcing the weaker eye to work harder and develop better visual acuity, encouraging the brain to reestablish connections with the weaker eye and improve its visual function.

Other treatment options may include the following:

  • Glasses or contact lenses: Prescribed corrective eyewear for conditions that can cause lazy eye, such as refractive errors.
  • Atropine eye drops: These work similarly to an eye patch—the drops temporarily blur vision in the stronger eye to encourage using the weaker one.
  • Vision therapy: Includes eye exercises to improve eye coordination and focus Surgery: Can address the underlying causes of lazy eye, such as crossed eyes.

Customized Treatment for Lazy Eye

Lazy eye is a treatable condition, but early intervention is key for helping to strengthen vision. Detecting and addressing lazy eye during early childhood offers the greatest potential for improvement. However, treatment can still be effective beyond this age, with individuals of all ages experiencing visual acuity and binocular vision improvements. If you suspect your child may have a lazy eye, book an appointment with Milton Eye and Vision Care. Our team can provide a comprehensive evaluation, determine a course of treatment with a customized treatment plan, and guide you through the process to help improve you visual function and quality of life.

Written by

Dr. Ronald Nicholas Strohan

Dr. Strohan has been an integrative optometrist in the Milton, Ontario area for over 40 years and has always stayed true to his philosophy of focusing on excellent patient eye care. He has studied behavioural optometry for more than 4 decades and is passionate about providing clear vision for patients of all ages. He takes pride in offering the latest eye care products and advancements in vision therapy.

See his other articles
Milton Eye and Vision Care - Dr Ron Strohan Logo

Legal Notice

The information below applies to all the information contained on the Website.

The users of this Website agree to comply with the terms set out below.


Milton Eye and Vision Care - Dr Ron Strohan owns and operates a Website at (hereinafter referred to as the “site” or “Website”). Milton Eye and Vision Care - Dr Ron Strohan® trademark except as otherwise noted on the site, which is accessible to all users (hereinafter referred to as the “user” or “users”). Refrain from using this Website unless you agree to comply with the conditions.


Information on this Website is intended for informational purposes only and has no contractual value. Milton Eye and Vision Care - Dr Ron Strohan reserves the right to modify the content of this site. At any time, without prior notice. Milton Eye and Vision Care - Dr Ron Strohan assumes no liability for errors or omissions in the content of this Website or for information reliability or completeness of said information.

Information published on this Website is based on marketing, statistical or commercial services or other sources the Milton Eye and Vision Care - Dr Ron Strohan considers reliable and are the sole responsibility of their authors and not of Milton Eye and Vision Care - Dr Ron Strohan. We do not assume any liability for the accuracy or completeness of said information and in no circumstance should this information be regarded as such. Opinions and information as presented on this site reflect our position as of the date of publication and are subject to change without notice.


Milton Eye and Vision Care - Dr Ron Strohan, its employees and directors will not be liable for damages incurred as a result of the information published on this site, for the views and advice published, expressed or implied regardless of its nature.

Milton Eye and Vision Care - Dr Ron Strohan expressly refuses any and all responsibility for the manner in which the user of the site may use the information contained, in any decisions that may be made and in the actions that may or may not be taken based on said information.


Presentations made and contained on this site are the intellectual property of Milton Eye and Vision Care - Dr Ron Strohan. Reproduction in whole or in part of this site on any other medium in prohibited without the express permission of Milton Eye and Vision Care - Dr Ron Strohan.

User may solely use the information contained on this site for personal use. Reproduction in whole or in part of said information on paper may only be performed for personal use. Said information is not to be copied, distributed or transmitted to third parties nor may it be inserted in a document or other medium.


The links to external Websites and their content shall not be prejudged and Milton Eye and Vision Care - Dr Ron Strohan will in no way be held responsible for any direct or indirect prejudice that may result from gaining access to and usage of said sites.


Milton Eye and Vision Care - Dr Ron Strohan draws the attention of the user to the fact that all communication transmitted through this Website remains in the public domain and not the private domain. OSI cannot accept responsibility for the security of the transmission of information.

The confidentiality and integrity of the information circulating over the internet cannot be ensured. Milton Eye and Vision Care - Dr Ron Strohan cannot accept responsibility in the case that data contained on this site is intercepted.

Milton Eye and Vision Care - Dr Ron Strohan site uses cookies. These cookies are small text files saved on the hard disk of a user's computer. These files are completely harmless and cannot contain viruses. These cookies are used to analyze visits to the site. Milton Eye and Vision Care - Dr Ron Strohan calls upon Google Analytics to help track how users use the site. The number of visitors, path taken to access the site and length of each visit are measured. The cookies cannot, in any way, identify the user. All data is completely anonymous and compiled solely for the purpose of improving the site and tailoring the content to the needs of its visitors.

The person responsible for the protection of personal information is the owner of : Milton Eye and Vision Care - Dr Ron Strohan


Milton Eye and Vision Care - Dr Ron Strohan makes no representations that the content of this site is free of infections, viruses, worms, Trojan horses and/or other codes with contaminating or destructive properties. It is the user's responsibility to take protective measures.


Under no circumstances shall Milton Eye and Vision Care - Dr Ron Strohan be held responsible for transmission errors of any sort, such as loss of or damage to data, or changes of any type whatsoever, including direct or indirect damage resulting from the use of the services provided on this site.


This Agreement shall be governed by and construed in accordance with the laws of the province of Ontario. Any dispute arising of this Agreement shall be brought before the court in the judicial district of Milton Eye and Vision Care - Dr Ron Strohan's head office.
106 Wakefield Road
Wakefield Professional Center
Milton, ON
L9T 2L8;
Tel: 905 878-5882.


Milton Eye and Vision Care - Dr Ron Strohan
106 Wakefield Road
Wakefield Professional Center
Milton, ON
L9T 2L8
Tel: 905 878-5882

Acceptance of the Privacy Policy

Thank you for visiting (the “Website”), provided to you by Milton Eye and Vision Care - Dr Ron Strohan (“We”). We respect the privacy of every individual who visits the Website and are sensitive to privacy issues on the Internet. We believe it is important that you know how we deal with information received about you.

This privacy policy (the “Privacy Policy”) explains how we collect, use, disclose, and protect the personal information of our customers and Website users ("you"), describes the types of information we may collect from you or that you may provide to us, and our practices for collecting, using, maintaining, protecting, and disclosing that information. The Website is for general audiences and is not specifically targeted to or intended for use by children.

We will only use your personal information in accordance with this Privacy Policy unless otherwise required by applicable law. We take steps to ensure that the personal information that we collect about you is adequate, relevant, not excessive, and used for limited purposes. Privacy laws in Canada generally define "Personal Information" as any information about an identifiable individual, which includes information that can be used on its own or with other information to identify, contact, or locate a single person.

By accessing or using the Website, you are accepting the practices described in this Privacy Policy, and you are consenting to our processing of your information as set out in this Privacy Policy. We may modify or update this Privacy Policy from time to time; if we change this Privacy Policy in a manner that materially impacts your privacy rights, we will provide a notice to you. Your continued use of the Website or our services after any modification to this Privacy Policy will constitute your acceptance of such modification. However, when required by law, we will confirm your consent to the revised Privacy Policy terms. This Privacy Policy is incorporated into and considered a part of the Website Terms and Conditions of Use, located here

What information we collect

We collect and use several types of information from and about you, including:

How we collect the information

Information You Provide to Us

The information we collect directly from you may include:

Information We Collect While You Interact With Us Through Cookies and Other Automatic Data Collection Technologies
Information We Collect About You From Third Parties

How we use your information

We use your information, including your Personal Information, to manage our business and to maintain and develop commercial relationships with you. We will collect, use, and disclose such information only to the extent that is necessary for those purposes.

We use information that we collect about you or that you provide to us, including any Personal Information:

How we share your information

We will not rent or sell your information to third parties without your consent. We only share your data as specifically provided in this Privacy Policy.

Other Disclosures

In addition to any disclosure you may have consented to or permitted under the terms of this Privacy Policy, we may transfer your data, including Personal Information to third parties in the following limited circumstances:

  1. information you expressly consent to be shared;
  2. when relating to anonymized information (individuals cannot be identified by it);
  3. when you decide to make the information indexable by search engines, to share or to distribute the information to people or otherwise to make it available to the public;
  4. to satisfy any applicable law, regulation, legal process or enforceable governmental request within or outside your country of residence when we have a good faith belief that the law requires it;
  5. to enforce this Privacy Policy, the Terms, or an agreement, including investigation of potential violations thereof;
  6. to detect, prevent, or otherwise address fraud, security or technical issues, or protect the operations or you;
  7. to protect our rights, property or safety as well as yours, the public, or others;
  8. in connection with an acquisition, merger, change in control, debt financing, reorganization, sales of assets, bankruptcy or other change of our corporate structure or status; or
  9. as necessary in connection with the performance of requested services or solutions, or as otherwise appropriate in connection with a legitimate need.

How we store and secure your information

Information Security

We are committed to protecting the confidentiality, integrity, availability and privacy of your Personal Information. We have put appropriate physical, technological and procedural security measures in place designed to help prevent your Personal Information from being lost, used, modified or accessed in an unauthorized way, or improperly disclosed. Examples of such measures include restricted access to offices, training of personnel, using passwords and well-defined internal policies and practices. We also use encryption technology and Secure Socket Layers ("SSL") in all areas of the Website where your personal account information is required.

In addition, we limit access to your Personal Information to those employees, agents, contractors and other third parties who have a business need-to-know. They will be required to process your Personal Information only on our instructions and they are subject to an obligation of confidentiality. Our service providers are required to maintain adequate security protections in place designed to help safeguard your Personal Information and are not permitted to use it for any purpose other than fulfilling services to us.

If you have any questions about securing your personal data, please contact us in accordance with the “How to Contact Us” section below.

Information Retention

We will retain your Personal Information for as long as it is needed:

  1. to provide the products and services that you have requested;
  2. to communicate with you about a purchase or a request you have made to us;
  3. to manage your choices and rights you have exercised pursuant to this Privacy Policy;
  4. to comply with our legal and regulatory obligations and to demonstrate compliance,
  5. to resolve disputes and to enforce our rights and agreements.

We may retain non-personal information that has been sufficiently aggregated or anonymized for a longer period.

Once the retention period is over, we will dispose of your Personal Information as provided for in our internal data retention and disposal policy.

Where We Store Information

We use facilities operated by "Amazon Web Services" and located in Canada as our information storage and processing infrastructure. Our service providers can also, from time to time, store your Personal Information in accordance with purposes outlined in this Privacy Policy.

How to contact us

If you have any questions about this Privacy Policy, you can contact us at 905 878-5882.