user4841: Wikipedia describes ignorance and delusions. This appears to be academic and do not find examples that are easily related. 

What is ignorance?
How is it different to delusions or are they the same?
What are real world examples of ignorance?


user295: Ignorance is not seeing things as they are due to clouding by our perception, views, unskilled nature scattered nature of our mind. In relation to unsatisfactory nature of existence, it is not seeing the 3 marks of existence, the 4 noble truths and dependent origination. 
Delusion can be the perception and view itself.

user6994: There are two types of ignorance:

Ignorance of not knowing (such as explained by Orion; and there is also not knowing [about] karma, and so forth). As Tsongkhapa writes in the Middle-Length Lam Rim:

Ignorance Ignorance is afflicted un-knowing due to a mind that is
  unclear with regard to the nature of the four truths, actions and
  their effects, and the Three Jewels.

ignorance which is a mistaken mode of apprehension.

The entity of ignorance which is 'a mistaken mode of apprehension' vary depending Tenets. For instance, Prasangika-Madhyamikas tend to define it as the conception of inherent existence of person and phenomena.
Though, all Tenets posit this ignorance as:

An affliction. It is thus called 'afflicted ignorance'
The first of the twelve links of dependent-arising
The root of cyclic existence
The basis on which depend all other afflictions

Likewise, through the darkness of ignorance obscuring the clear mode
  of subsistence of the aggregates, the deception regarding the
  aggregates as a self arises, and from that the other mental
  afflictions arise.

A wrong consciousness
A conceptual consciousness
Concealing reality
The exact opposite of the exalted wisdom directly realizing emptiness

Although in general ignorance is posited as the mere opposite of
  knowledge, here it is the opposite of the knowledge realizing the lack
  of true existence

Superimposition of [a non-existent mode of existence, which vary in dependence of Tenets]
And so forth.


user43: In Mahayana Buddhism "ignorance" has a special meaning. It's not just not knowing stuff, it's making generalizations and assumptions based on superficial observations.
It starts with us making a generalization about things we don't fully know. Once we have made this mistake we have set ourselves up for trouble. Indeed, if we operate based on flawed assumptions it's only a matter of time before we clash with things as they really are. Unfortunately, most of us keep on grasping to our assumptions even after they are proven to be false. We keep on craving for things to be as we imagine them and suffer when they don't agree. Thus it is said that craving is the immediate cause of suffering, grasping (or attachment) is its condition and ignorance is its ultimate root.
You can see this mechanism at play in most conflicts: from global political and religious confrontations to a kitchen argument between you and your teenage child. It is in the nature of the developing human mind to make observations and build assumptions, even if both are simplistic and flawed.

user3551: Ignorance in Buddhism is not knowing the the Four Noble Truths.It is not knowing the truth behind suffering.

"And what is ignorance,...Not knowing about dukkha.
  MN 9 (Ñanamoli/Bodhi, trans.).
Avijja, the Pali word for ignorance, is the opposite of vijja, which means not only "knowledge" but also "skill" — as in the skills of a doctor or animal-trainer. So when the Buddha focuses on the ignorance that causes stress and suffering, saying that people suffer from not knowing the four noble truths,...
  Ignorance by Thanissaro Bhikku

Ignorance is similar to delusion but with subtle differences.In order to find the difference between delusion and ignorance i will first provide a definition for 'delusion'.

a belief that is not true : a false idea 
  Merriam-webster dictionary

Comparing this definition with 'ignorance' in the buddhist context,delusion is a view based on ignorance.Delusion is similar to wrong view and ignorance is the not knowing itself.
To give a real world example,a person drives a car badly but think he is driving a car well.The person is deluded.Why is the person deluded?Because the person doesn't know what is good driving and bad driving.(Ignorance).The lack of knowledge in itself is ignorance and the actions that stem from it is delusional.

4841: <p><a href="http://en.wikipedia.org/wiki/Avidy%C4%81_%28Buddhism%29">Wikipedia</a> describes ignorance and delusions. This appears to be academic and do not find examples that are easily related. </p>

<ul>
<li>What is ignorance?</li>
<li>How is it different to delusions or are they the same?</li>
<li>What are real world examples of ignorance?</li>
</ul>
 295: <p>Ignorance is not seeing things as they are due to clouding by our perception, views, unskilled nature scattered nature of our mind. In relation to unsatisfactory nature of existence, it is not seeing the 3 marks of existence, the 4 noble truths and dependent origination. </p>

<p>Delusion can be the perception and view itself.</p>
 6994: <p>There are two types of ignorance:</p>

<ol>
<li><p>Ignorance of not knowing (such as explained by Orion; and there is also not knowing [about] karma, and so forth). As Tsongkhapa writes in the <em>Middle-Length Lam Rim</em>:</p>

<blockquote>
  <p>Ignorance Ignorance is afflicted un-knowing due to a mind that is
  unclear with regard to the nature of the four truths, actions and
  their effects, and the Three Jewels.</p>
</blockquote></li>
<li><p>ignorance which is a mistaken mode of apprehension.</p></li>
</ol>

<p>The entity of ignorance which is 'a mistaken mode of apprehension' vary depending Tenets. For instance, Prasangika-Madhyamikas tend to define it as the <strong>conception of inherent existence</strong> of person and phenomena.</p>

<p>Though, all Tenets posit this ignorance as:</p>

<ul>
<li>An affliction. It is thus called 'afflicted ignorance'</li>
<li>The first of the twelve links of dependent-arising</li>
<li>The root of cyclic existence</li>
<li><p>The basis on which depend all other afflictions</p>

<blockquote>
  <p>Likewise, through the darkness of ignorance obscuring the clear mode
  of subsistence of the aggregates, the deception regarding the
  aggregates as a self arises, and from that the other mental
  afflictions arise.</p>
</blockquote></li>
<li><p>A wrong consciousness</p></li>
<li>A conceptual consciousness</li>
<li>Concealing reality</li>
<li><p>The exact opposite of the exalted wisdom directly realizing emptiness</p>

<blockquote>
  <p>Although in general ignorance is posited as the mere opposite of
  knowledge, here it is the opposite of the knowledge realizing the lack
  of true existence</p>
</blockquote></li>
<li><p>Superimposition of [a non-existent mode of existence, which vary in dependence of Tenets]</p></li>
<li>And so forth.</li>
</ul>
 43: <p>In Mahayana Buddhism &quot;ignorance&quot; has a special meaning. It's not just <em>not knowing</em> stuff, it's making generalizations and assumptions based on superficial observations.</p>
<p>It starts with us making a generalization about things we don't fully know. Once we have made this mistake we have set ourselves up for trouble. Indeed, if we operate based on flawed assumptions it's only a matter of time before we clash with things as they really are. Unfortunately, most of us keep on grasping to our assumptions even after they are proven to be false. We keep on craving for things to be as we imagine them and suffer when they don't agree. Thus it is said that craving is the immediate cause of suffering, grasping (or attachment) is its condition and ignorance is its ultimate root.</p>
<p>You can see this mechanism at play in most conflicts: from global political and religious confrontations to a kitchen argument between you and your teenage child. It is in the nature of the developing human mind to make observations and build assumptions, even if both are simplistic and flawed.</p>
 3551: <p>Ignorance in Buddhism is not knowing the the Four Noble Truths.It is not knowing the truth behind suffering.</p>

<blockquote>
  <p>"And what is ignorance,...Not knowing about dukkha.
  <a href="http://www.accesstoinsight.org/ptf/dhamma/sacca/sacca2/avijja.html">MN 9 (Ñanamoli/Bodhi, trans.).</a></p>
  
  <p>Avijja, the Pali word for ignorance, is the opposite of vijja, which means not only "knowledge" but also "skill" — as in the skills of a doctor or animal-trainer. So when the Buddha focuses on the ignorance that causes stress and suffering, saying that people suffer from not knowing the four noble truths,...
  <a href="http://www.accesstoinsight.org/lib/authors/thanissaro/ignorance.html">Ignorance by Thanissaro Bhikku</a></p>
</blockquote>

<p>Ignorance is similar to delusion but with subtle differences.In order to find the difference between delusion and ignorance i will first provide a definition for 'delusion'.</p>

<blockquote>
  <p>a belief that is not true : a false idea 
  <a href="http://www.merriam-webster.com/dictionary/delusion">Merriam-webster dictionary</a></p>
</blockquote>

<p>Comparing this definition with 'ignorance' in the buddhist context,delusion is a view based on ignorance.Delusion is similar to wrong view and ignorance is the not knowing itself.</p>

<p>To give a real world example,a person drives a car badly but think he is driving a car well.The person is deluded.Why is the person deluded?Because the person doesn't know what is good driving and bad driving.(Ignorance).The lack of knowledge in itself is ignorance and the actions that stem from it is delusional.</p>
