<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[quickguide.org]]></title><description><![CDATA[This site offers information related to cataract, IOL calculation or biometry, corneal topography, phacoemulsification, Intra Ocular Lens Optics, etc.]]></description><link>https://www.quickguide.org/subha</link><generator>RSS for Node</generator><lastBuildDate>Thu, 30 Apr 2026 01:19:03 GMT</lastBuildDate><atom:link href="https://www.quickguide.org/de/blog-feed.xml" rel="self" type="application/rss+xml"/><item><title><![CDATA[A Beginner's Guide to the Optics of Intra Ocular Lens for Eye Care Professionals]]></title><description><![CDATA[Understanding the basics of optics is essential for eye care professionals because it enables them to accurately diagnose and manage various visual problems. A solid foundation in optics helps professionals explain how light interacts with the eye, understand refractive errors such as myopia, hyperopia, astigmatism, and presbyopia, and determine appropriate corrective measures like glasses, contact lenses, or surgical options. Additionally, knowledge of optics allows for the proper adjustment...]]></description><link>https://www.quickguide.org/post/a-guide-optics-of-intra-ocular-lenses</link><guid isPermaLink="false">6869ef7a241a1bcbebc904e2</guid><category><![CDATA[Optics]]></category><pubDate>Sun, 06 Jul 2025 12:34:44 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_dc340f3ff60b4dc6b61d2253447af827~mv2.png/v1/fit/w_347,h_321,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Why hight light utilization may not lead to high image quality with diffractive intraocular IOLs]]></title><description><![CDATA[Diffractive intraocular lens are designed to distribute incident light into multiple focal points, enabling functional vision across distances. In this context, light utilization—the percentage of incident directed into useful diffraction orders—has emerged as a commonly cited performance metric. Manufacturers often report efficiencies approaching 85–90%, implicitly suggesting that higher values correspond to superior optical performance. However, clinical experience and optical theory...]]></description><link>https://www.quickguide.org/post/light-utilization</link><guid isPermaLink="false">69eb44b0bd17c4ada3c38bcb</guid><category><![CDATA[Optics]]></category><category><![CDATA[Video]]></category><pubDate>Fri, 24 Apr 2026 10:43:15 GMT</pubDate><enclosure url="http://www.youtube.com/watch?v=9mcd5KzHgwU" length="0" type="video"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Refractive Surprise Analyzer &#38; Second Eye IOL Power Calculator]]></title><description><![CDATA[Here is a tool that will help you to analyse the root cause of refractive surprise and what you could do for the second eye by taking into account the refractive surprise of the first eye.]]></description><link>https://www.quickguide.org/post/refractive-surprise-analyzer</link><guid isPermaLink="false">69d267fcd142869289e5a7b6</guid><category><![CDATA[Tools]]></category><pubDate>Sun, 05 Apr 2026 15:39:31 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_1901a17e507f4b7e889c1bf05fb6d185~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Choosing the Right IOL Power in Borderline Astigmatism - non toric IOL power calculator!]]></title><description><![CDATA[The clinical dilemma Imagine planning an EDOF or diffractive multifocal IOL in a patient with borderline corneal astigmatism. The astigmatism is too low to justify a toric IOL Yet high enough to potentially degrade visual quality, especially with premium optics  The real-world scenario In this case in image 1 below Keratometry shows ~0.81 D astigmatism The IOL of choice highlighted is 26.50 against a spherical equivalent (SE) of -.11 with the SRK T formula.  This falls into a grey zone for...]]></description><link>https://www.quickguide.org/post/with-non-toric-iol-power-calculator</link><guid isPermaLink="false">69b93f79faed8c5e63cab6f0</guid><category><![CDATA[Tools]]></category><pubDate>Tue, 17 Mar 2026 11:49:27 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_1de60c15eecc48858808d249fcd1a3d4~mv2.jpg/v1/fit/w_247,h_627,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[A constant personalization Tool]]></title><description><![CDATA[This tool helps you to optimize/personalize a-constant for better refractive outcomes.]]></description><link>https://www.quickguide.org/post/a-constant-personalization-tool-1</link><guid isPermaLink="false">69b4fc6fc0bc1d0b8ea1366a</guid><category><![CDATA[Tools]]></category><category><![CDATA[Biometry]]></category><pubDate>Sat, 14 Mar 2026 06:19:53 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_a653108b0e6a4f9f8432f34f2aa7ad38~mv2.jpg/v1/fit/w_1000,h_274,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Interpreting the iTrace Maps: A Practical Guide for Clinicians for premium IOL]]></title><description><![CDATA[ iTrace maps analyze how light actually travels through the eye by sending sequential laser beams through the pupil and tracing their exit from the retina. This method allows clinicians to separate corneal aberrations from internal aberrations, an extremely useful feature when evaluating cataract patients, premium IOL candidates, and post-refractive surgery eyes.]]></description><link>https://www.quickguide.org/post/interpreting-the-itrace-maps-a-practical-guide-for-clinicians-for-premium-iol</link><guid isPermaLink="false">69b005078433d506464328dd</guid><category><![CDATA[Biometry]]></category><pubDate>Tue, 10 Mar 2026 13:20:27 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_a5385bd2a8dd4bb2aa65574bee8d5fb1~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[TEN Essential Aspects to Check in Optical Biometry to Avoid Refractive Surprise Post IOL Implantation]]></title><description><![CDATA[This post highlights ten essential things to check in the optical biometry chart. Understanding these factors helps surgeons make informed decisions, improving refractive outcomes and patient satisfaction.]]></description><link>https://www.quickguide.org/post/essential-aspects-to-check-in-optical-biometry-to-avoid-refractive-surprises-post-iol-implantation</link><guid isPermaLink="false">69ad462ad66894c6d6f84d21</guid><category><![CDATA[Biometry]]></category><pubDate>Sun, 08 Mar 2026 12:44:28 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_44edd03ffbc24c03bd6253378000129a~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[This is why they say a 1 degree rotation of Toric IOL leads to 3.3% loss in toric correction]]></title><description><![CDATA[Have you ever wondered why they say that for every 1 degree of rotation, there is a loss of 3.3% in toric correction at the cornea plane? Why 3.3%, why not 2%, why not 4%. Where on earth does the 3.3 come from? Here is a breakdown of where the number comes from. Although there is some math involved, I will keep it simple and conceptual. To start with, in ophthalmology, 0 degree and 180 degrees are considered as the same meridian. Aligning the Toric IOL at 0 degrees in the eye, is the same as...]]></description><link>https://www.quickguide.org/post/this-is-why-they-say-a-1-degree-rotation-of-toric-iol-leads-to-3-3-loss-in-toric-correction</link><guid isPermaLink="false">69a18a2b32a596f2a27bd3c4</guid><category><![CDATA[TORIC]]></category><pubDate>Fri, 27 Feb 2026 12:59:38 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_3759d38072d94c32927aa50f036a9bc5~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Complete Guide to IOL Power Calculation - Advanced Masterclass]]></title><description><![CDATA[Provides detailed understanding of IOL power calculation formulas and biometry]]></description><link>https://www.quickguide.org/post/complete-guide-to-iol-power-calculation-advanced-masterclass</link><guid isPermaLink="false">699c50343633f91285ed09e0</guid><category><![CDATA[Masterclass]]></category><pubDate>Mon, 23 Feb 2026 16:48:17 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_1a08c284782f4bafb13a7b7f30b46318~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Understanding the Mechanics of Modern EDOF IOL Optics for Enhanced Depth of Focus]]></title><description><![CDATA[This video explains how modern IOLs including EDOF IOLs work to provide depth of focus and intermediate vision to patients. It also explains how to interpret the defocus curve or how to generate a defocus curve for such patients.]]></description><link>https://www.quickguide.org/post/how-modern-edof-iol-optics-work</link><guid isPermaLink="false">698ab7d83faa9e439bed51cb</guid><category><![CDATA[Video]]></category><pubDate>Tue, 10 Feb 2026 04:55:52 GMT</pubDate><enclosure url="http://www.youtube.com/watch?v=_bdbuJGfepw" length="0" type="video"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Discovering quickguide.org: Your Go-To Resource for Eye Care Professionals]]></title><description><![CDATA[quickguide.org  is an informal educational resource specifically designed for eye care professionals. It focuses on biometry, intraocular lens (IOL) power calculation, and advanced optics. This platform aims to simplify complex concepts, making them accessible and understandable. Educational Value and Content Quickguide.org offers deep technical insights into cataract surgery preparation. Its educational strengths include: Complex Concepts Simplified : The site provides guides on advanced...]]></description><link>https://www.quickguide.org/post/about-quickguide-org</link><guid isPermaLink="false">6966664acca849701e94d8db</guid><pubDate>Tue, 13 Jan 2026 15:37:01 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_e20951445bf04be39b42ebbbd6b4e238~mv2.jpg/v1/fit/w_328,h_123,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Why Multifocal IOL Patients Sometimes Have Poor Near Vision Despite Good Distance Vision]]></title><description><![CDATA[Patients with multifocal IOLs expect to be free from glasses for distance, intermediate, and near vision. However, refractive surprises can occur, leading some patients to still require glasses. In my earlier article, "The Mystery of the Near with Presbyopia Correction IOL" ( link ), I discussed how factors like corneal shape and axial length can affect near vision. In this article, I will explain how a refractive surprise or incorrect refraction can result in good distance vision but poor...]]></description><link>https://www.quickguide.org/post/near-vision-problem</link><guid isPermaLink="false">6920493f35662176f69ad5df</guid><category><![CDATA[Optics]]></category><pubDate>Fri, 21 Nov 2025 11:24:53 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_a2d68af6aeab40b387d04f316f2926a3~mv2.png/v1/fit/w_604,h_132,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Understanding Toric IOL Power Distribution in Intraocular Lens Optics]]></title><description><![CDATA[Explains how the Toric IOL nomenclature works and how the IOL power is distributed in the IOL optics for a spherical equivalent IOL power of 10 diopters and a Toric model of T4 or T5]]></description><link>https://www.quickguide.org/post/explaining-toric-iol-power-distribution-in-intra-ocular-lens-iol-optics</link><guid isPermaLink="false">68f8877e4d132695a283015c</guid><category><![CDATA[TORIC]]></category><category><![CDATA[Video]]></category><pubDate>Wed, 22 Oct 2025 11:08:36 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_f58cc7d5db48463282324a0d743dd1bf~mv2.png/v1/fit/w_427,h_549,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Understanding Modern IOL Power Calculation Formulas Haigis, Barrett, EVO and Kane Explained]]></title><description><![CDATA[This article provides insights into the different modern IOL power calculation formulas like the Barrett Universal, Kane and EVO formula]]></description><link>https://www.quickguide.org/post/a-brief-explanation-of-modern-iol-power-calculation-formulas</link><guid isPermaLink="false">68b84452cbc92a7dd93e9d77</guid><category><![CDATA[Biometry]]></category><pubDate>Thu, 04 Sep 2025 14:33:23 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_af560d74ea7a4138b9be57a080e8fc8b~mv2.png/v1/fit/w_1000,h_853,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Choice of EDOF according to individual patients spherical aberration values]]></title><description><![CDATA[The following table will help in the choice of EDOF IOL based on spherical aberration of the cornea of the patient and the induced spherical aberration by the IOL]]></description><link>https://www.quickguide.org/post/choice-of-edof-according-to-individual-patients-spherical-aberration-values</link><guid isPermaLink="false">68a1d0c06aa481be492c72ad</guid><category><![CDATA[Quick]]></category><pubDate>Sun, 17 Aug 2025 13:02:50 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_1c9e6716fc2f4c5695c2bb27c9267d3e~mv2.png/v1/fit/w_775,h_735,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[EDOF versus Monofocal Options: Navigating the Choice of IOL for Cataract Surgery]]></title><description><![CDATA[Cataract surgery is one of the most common procedures performed worldwide, helping millions regain clear vision each year. For patients, choosing the right Intraocular Lens (IOL) is a significant decision during this process. The two primary types are Extended Depth of Focus (EDOF) lenses and Monofocal lenses. Understanding the differences between these options can empower patients to make informed choices that fit their lifestyles and vision needs.]]></description><link>https://www.quickguide.org/post/edof-versus-monofocal</link><guid isPermaLink="false">6845a6b714f5ed112181853e</guid><pubDate>Sun, 08 Jun 2025 15:13:43 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_94458d0c897742948c53b501958c6972~mv2.png/v1/fit/w_429,h_247,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Positive or negative spherical aberration- Which of the two provides better depth of focus by EDOF IOLs?]]></title><description><![CDATA[This article provides an understanding of circle of least confusion or best focus in presence of spherical aberration and what kind of spherical aberration may provide a better depth of focus]]></description><link>https://www.quickguide.org/post/edof-iol</link><guid isPermaLink="false">683c421e0371dc85b9dddf97</guid><category><![CDATA[Optics]]></category><pubDate>Wed, 04 Jun 2025 11:41:23 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_11f1f9d7f5854fa2a3060f75af020862~mv2.jpg/v1/fit/w_1000,h_505,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Relation between the mesopic pupil size and diffractive zone of multifocal IOL]]></title><description><![CDATA[finding the cut off value for mesopic pupil size may be important for clinicians to ensure that patients have a good distance vision even in low light]]></description><link>https://www.quickguide.org/post/relationship-between-the-mesopic-pupil-size-and-diffractive-zone-of-multifocal-iol</link><guid isPermaLink="false">68283d100b7f5042f1d9f82c</guid><category><![CDATA[Optics]]></category><pubDate>Sat, 17 May 2025 09:12:11 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_6e89cb00de4948b3854d5251afc0c6c3~mv2.jpg/v1/fit/w_543,h_241,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[How does the PanOptix Pro reduce light scatter and improves light utilization?]]></title><description><![CDATA[How does the Panoptix Pro utilize more light and reduce light scatter.]]></description><link>https://www.quickguide.org/post/panoptix-pro-reduce-light-scatter</link><guid isPermaLink="false">68148f586eea33cd6f3d7620</guid><category><![CDATA[Optics]]></category><pubDate>Fri, 02 May 2025 09:30:04 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/6454f7_027fcd459d83495f85d898cb56247909~mv2.jpg/v1/fit/w_622,h_302,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item><item><title><![CDATA[Why some patients may not be happy with EDOF IOLs]]></title><description><![CDATA[Why some patients may not be happy with an EDOF IOL.]]></description><link>https://www.quickguide.org/post/why-some-patients-may-not-be-happy-with-edof-iols</link><guid isPermaLink="false">681330d580e2422fe50eaddf</guid><category><![CDATA[Video]]></category><pubDate>Thu, 01 May 2025 08:32:07 GMT</pubDate><enclosure url="http://www.youtube.com/watch?v=QlM5ymC04L8" length="0" type="video"/><dc:creator>Subhabrata Bhattacharya</dc:creator></item></channel></rss>